Del Norte • Humboldt • Mendocino • Sonoma • Marin

Del Norte

NO. 497 S.S. EMIDIO - Nearby are portions of the hull of the General Petroleum Corporation tanker S.S. Emidio, which on December 20, 1941 became the first casualty of the Imperial Japanese Navy's submarine force action on California's Pacific Coast. The ship was attacked some 200 miles north of San Francisco and five crewmen were killed. Abandoned, the vessel drifted north and broke up on the rocks off Crescent City. The bow drifted into the harbor, where it lay near this marker until salvaged in 1950.
Location: Beach Front Park and Picnic Area, SW corner of Front and H Sts, Crescent City

NO. 541 BROTHER JONATHAN CEMETERY - This memorial is dedicated to those who lost their lives in the wreck of the Pacific Mail steamer Brother Jonathan at point St. George's Reef, July 30, 1865.
Location: Located in park at Brother Johnathan Vista Point, SE corner 9th St and Pebble Beach Dr, Crescent City

NO. 544 FORT TER-WER - Site of Fort Ter-Wer, United States military post established October 12, 1857 by First Lieutenant George Crook and the men of Company D to keep peace between the Indians and whites. The fort was destroyed by a flood in December 1861, and abandoned June 10, 1862.
Location: From Hwy 101 take Ter-Wer Valley exit (Hwy 169) , go 3.4 mi to end of road, turn right on Ter-Wer Riffle Rd. Site at intersection of Ter-Wer Riffle and Klamath Glen Rds, Klamath

NO. 545 CAMP LINCOLN - A United States military post was established here September 12, 1862 by the men of Company G, 2nd Regiment, Infantry, California Volunteers, to keep peace between the Indians and the miners and settlers of northwestern California. It was abandoned in May 1870. Commanding officer's quarters and one barracks remain at the date of dedication of this site (1962).
Location: Take Hwy 199 E to Kings Valley Rd, go 1.2 mi NE to site, Crescent City

NO. 645 CRESCENT CITY PLANK AND TURNPIKE ROAD - This was the route of the Crescent City Turnpike, constructed in 1858. Following the present Elk Valley Road to Old Camp Lincoln, it then crossed the ridge, forded Smith River to Low Divide, and continued to Jacksonville, Oregon by way of various gold camps.
Location: Take Hwy 199 to Parkway Dr, go 1,000 ft to SE corner of Parkway Dr and Elk Valley Rd, Crescent City.

NO. 649 SITE OF OLD INDIAN VILLAGE AT PEBBLE BEACH, CRESCENT CITY - At the time of white contact the principal villages of the native Tolowa Indians of northern Del Norte County were located at Battery Point in Crescent City (Ta'atun), Pebble Beach (Meslteltun), south of Point St. George (Tatintun), and north of Point St. George (Tawiatun). The major villages were almost completely independent economic units.
Location: 1886 Pebble Beach Dr, 500 ft S of Pacific Ave, Crescent City

NO. 951 BATTERY POINT LIGHTHOUSE - The Battery Point Lighthouse is one of the first lighthouses on the California coast. Rugged mountains and unbridged rivers meant coastal travel was essential for the economic survival of this region. In 1855 Congress appropriated $15,000 for the construction of the light station, which was completed in 1856 by the U.S. Lighthouse Service. Theophilis Magruder was the station's first keeper; Wayne Philand was its last before automation in 1953.
Location:  Battery Pt Island, end of A St, Crescent City

Source:  California State Parks - Office of Historic Perservation (http://ohp.parks.ca.gov/?page_id=21416)

Humboldt

NO. 146 TRINIDAD HEAD - On June 11, 1775, Bruno de Hezeta, commandant of an expedition up the northwest coast, marched with his men and two Franciscan fathers from the shore of the bay to the summit of Trinidad Head. Here they erected a cross and took possession in the name of Charles III of Spain.
Location: 1.5 mi W of Hwy 101, Trinidad, USCG Station

NO. 154 FORT HUMBOLDT - By the early 1850s, newly arrived white settlers had moved into the Humboldt Bay area, causing conflict with the native inhabitants. To protect both Indians and settlers, Fort Humboldt was established in 1853 and operated until 1866. It became a focal point in the violent struggle between two cultures. Many Native Americans were assembled here before removal to reservations.
Location: 3431 Fort Ave, Eureka

NO. 164 THE OLD ARROW TREE - This site is said to have been used by Indians to commemorate an important peace treaty. In memory of the treaty, each tribe, upon passing, was supposed to have shot an arrow into the bark.
Location: 0.8 mi E of Korbel County Hwy F5L 100 (P.M. 2.2), Korbel

NO. 173 CENTERVILLE BEACH CROSS - On January 6, 1860 the steamer Northerner, northward bound from San Francisco, struck a hidden rock two miles off Cape Mendocino, and from there drifted to the Centerville Beach. Thirty-three passengers and 32 crew members were saved - the cross was erected by the Ferndale Parlor No. 93, N.D.G.W., in memory of the 17 passengers and 21 crew members who lost their lives in this disaster.
Location: 5 mi W of Ferndale on Centerville Rd (P.M. 0.8) USGS Quadrangle Sheet Name: FERNDALE

NO. 215 CAMP CURTIS - Camp Curtis was the headquarters of the Mountain Battalion from 1862 to 1865. There were many military posts established throughout this area for the protection of the white settlers. (Army spells Curtis with one s.)
Location: Take Sunset Ave offramp Hwy 101, go N 0.9 mi on L. K. Wood Blvd frontage Rd, Arcata

NO. 216 TOWN OF TRINIDAD - Founded April 8, 1850, Trinidad is the oldest town on the Northern California coast. During the 1850s, it served as a vital supply link between ships anchored at Trinidad Bay and miners in the Klamath, Trinity, Salmon River, and Gold Bluff mines. It was the county seat of Klamath County (now disbanded) from 1851 to 1854, but its population declined as Eureka and other area port cities developed.
Location: NW corner of Edwards and Hector Sts, Trinidad

NO. 477 CITY OF EUREKA - Eureka was founded as a town in 1850 and incorporated as a city in 1874. Located on the remote northwestern coast of California, Eureka was the region's major port of entry by water in the 19th century before the construction of good access by land, and rose to historical prominence as the major social, political, and economic center of the region. 'Eureka' is a Greek expression and a popular mining term meaning 'I have found it.'
Location: NW corner, 3rd and E Sts, old town, Eureka

NO. 543 CALIFORNIA'S FIRST DRILLED OIL WELLS - California's first drilled oil wells that produced crude to be refined and sold commercially were located on the North Fork of the Mattole River approximately three miles east of here. The old Union Mattole Oil Company made its first shipment of oil from here, to a San Francisco refinery, in June 1865. Many old well heads remain today.
Location: NE corner Mattole Rd and Front St, Petrolia

NO. 783 JACOBY BUILDING - The basement and first story of this building were constructed in 1857 for Agustus Jacoby, and housed various mercantile firms during its early years as a principal supply point for the Klamath-Trinity mining camp trade. It served occasionally as a refuge in time of the Indian troubles from 1858 through 1864. It was acquired by A. Brizard in 1880.
Location: Eighth and H (plaque at NE corner, structure at SE corner), Arcata

NO. 838 OLD INDIAN VILLAGE OF TSURAI - Directly below was located the Yurok village of Tsurai. A prehistoric permanent Indian community, it was first located and described by Captains Bodega and Heceta, June 9-19, 1775. The houses were of hand-split redwood planks, designed for defense and protection. The village was occupied until 1916.
Location: SW corner of Ocean and Edwards Sts, Trinidad

NO. 842 ARCATA AND MAD RIVER RAIL ROAD COMPANY - Incorporated December 15, 1854, as the Union Plank Walk, Rail Track, and Wharf Company, the Arcata and Mad River Rail Road is the oldest line on the north coast. Originally using a horse-drawn car, the railroad served as a link between Humboldt Bay and the Trinity River mines. Later, locomotives were added as the line grew to serve the redwood industry.
Location: 330 Railroad Ave, NW corner Hatchery Rd and Railroad Ave, Blue Lake

NO. 882 HUMBOLDT HARBOR HISTORICAL DISTRICT - Captain Jonathan Winship made the first recorded entry into Humboldt Bay by sea in June 1806, and Josiah Gregg's party visited the bay in 1849. By 1850 the Laura Virginia Association had founded Humboldt City, Union (Arcata), Bucksport, and Eureka - in subsequent years, the bay became a major North Coast lumber port and shipbuilding center.
Location: Harold Larsen Vista Pt, Humboldt Hill Rd off Hwy 101 (P.M. 73.7), Eureka

NO. 883 FERNDALE - This pioneer agricultural community, settled in 1852, helped feed the booming population of mid-century San Francisco. Long known as 'cream city,' Ferndale made innovative and lasting contributions to the dairy industry. Local creameries, and the town's role as a transportation and shipping center in the late 19th and early 20th centuries, fostered prosperity that produced Ferndale's outstanding Victorian-Gothic residential and false-front commercial architecture.
Location: Ferndale City Hall Park, intersection of Main and Herbert Sts, Ferndale

Source:  California State Parks - Office of Historic Perservation (http://ohp.parks.ca.gov/?page_id=21420)

Mendocino

NO. 549 SQUAW ROCK - This early landmark, also called Lover's Leap, is associated with the purported legend of a 19th-century Sanel Indian maiden, Sotuka. Her faithless lover, Chief Cachow, married another, all three were killed when Sotuka, holding a great stone, jumped from the precipice upon the sleeping pair below.
Location: Approx 6 mi S of Hopland on Hwy 101 (P.M. 5.1) 

NO. 615 FORT BRAGG - The fort was established in this vicinity June 11, 1857 by 1st Lieutenant (later Brigadier General) Horatio Gate Gibson, 3rd Artillery, U.S. Army, who named it in honor of his former company commander, Braxton Bragg, later General, CSA. The fort was abandoned in October 1864.
Location: 321 Main St, Fort Bragg 

NO. 674 ROUND VALLEY - This valley was discovered by Frank M. Azbill, who arrived from Eden Valley on May 15, 1854. During the same year, Charles Kelsey from Clear Lake also visited it and George E. White sighted it from Blue Nose.
Location: Inspiration Pt, on State Hwy 162 (P.M. 23.7), 5 mi S of Covelo 

NO. 714 MENDOCINO PRESBYTERIAN CHURCH - This is one of the oldest Protestant churches in continuous use in California. The Presbyterian Church, organized on November 6, 1859, dedicated the redwood building on July 5, 1868.
Location: 44831 Main St, Mendocino

NO. 926 SUN HOUSE - This house, constructed in 1911-12, is a unique Craftsman style redwood building which incorporates northwestern designs into its architecture. The Sun House was designed by George Wilcox and John W. and Grace Carpenter Hudson. Dr. Hudson was a recognized authority on American Indians, and especially California Pomo Indians. Mrs. Hudson, an outstanding artist, became widely known for her paintings of Pomo life.
Location: 431 S Main St, Ukiah

NO. 927 TEMPLE OF KWAN TAI - One of the oldest of California's Chinese houses of worship in continuous use, the temple may date back as far as 1854, though its documented history reaches only to 1883. The Chinese built many temples in California, but most have been destroyed, and no others remain on the North Coast.
Location: 45160 Albion St, Mendocino

NO. 980 UKIAH VICHY SPRINGS RESORT - Frank Marble discovered these springs in 1848, and William Day established a resort here in the 1850s. Ukiah Vichy represents one of the oldest and one of the few continuously operating mineral springs in California. Its waters remain among the most important of the thermal, alkaline-carbonated waters once so highly valued by both European and American believers in hydropathy. It is the only mineral springs in California that resembles the famed Grand Grille Springs of Vichy, France.
Location: 2701 Vichy Springs Rd, Ukiah 

NO. 1035 Point Arena Light Station -In 1989 the Point Arena Light Station was listed in the National Register of Historic Places for its statewide significance in the area of maritime history.  Coastal traffic increased substantially during the 1860s, and heavy storms and fogs often made trips along the coast treacherous.  The first buildings at the station were constructed in 1870 and were destroyed in 1906 during the San Francisco Earthquake.  At that time the U. S. Lighthouse Service decided to use reinforced concrete in the light house replacement.  Prior to this, reinforced concrete had not been employed in the construction of a California lighthouse.  Thus, when the Point Arena Lighthouse began operation in 1908, it became the first lighthouse of reinforced concreted in the State.  Strikingly situated between the Pacific Ocean to the west and rolling farmland on the east, the Point Arena Light Station retains the character and appearance of one hundred years ago.  
Location:  Lighthouse Road, Point Arena

Source:  California State Parks - Office of Historic Perservation (http://ohp.parks.ca.gov/?page_id=21431)

Somoma

NO. 3 MISSION SAN FRANCISCO SOLANO - On July 4, 1823, Padre José Altamira founded this northernmost of California's Franciscan missions, the only one established in California under independent Mexico. In 1834, secularization orders were carried out by Military Commandant M. G. Vallejo, and Mission San Francisco Solano became a parish church serving the Pueblo and Sonoma Valley until it was sold in 1881. 
Location: Sonoma State Historic Park, NW corner of Spain at 1st St E, Sonoma 

NO. 4 GENERAL M. G. VALLEJO HOME - The home of General Mariano Guadalupe Vallejo, known as 'Lachryma Montis' (Tears of the Mountain), was built in 1850. Its name was derived from the springs that now are the source of Sonoma's water supply. General Vallejo, born at Monterey July 7, 1808, was commander of the northern Mexican frontier, founder of the Pueblo of Sonoma, and a member of the first Constitutional Convention of California. 
Location: Vallejo Home, Sonoma State Historic Park, Spain at 3rd St W Sonoma 

NO. 5 FORT ROSS - Founded in 1812 by Russians from Alaska. When Russians withdrew to Alaska in 1841, Captain Sutter bought the improvements and supplies. The State acquired the fort in 1906 and the remaining buildings-Greek Orthodox Chapel, Commandant's Quarters, and Stockade-were restored. The chapel, destroyed by fire in 1970, was reconstructed in 1974. 
Location: 19005 Coast Hwy, State Hwy 1 (P.M. 33.0), 12 mi N of Jenner 

NO. 7 BEAR FLAG MONUMENT - On June 14, 1846, the Bear Flag Party raised the Bear Flag on this spot and declared California free from Mexican rule. Following the raising of the American flag at Monterey July 7, 1846 by Commodore John Drake Sloat, on July 9 the Bear Flag was hauled down and the American flag raised in its place by Lieutenant Joseph W. Revere, U.S.A., who had been sent to Sonoma from San Francisco by Commander John B. Montgomery of the U.S. Sloop-of-War Portsmouth. 
Location: Sonoma Plaza, E Spain and 1st St E, Sonoma Plaza 

NO. 17 BLUE WING INN - Erected by General M. G. Vallejo about 1840 to accommodate emigrants and other travelers, the Inn was purchased in gold rush days by Cooper and Spriggs, two retired sea-faring men, and operated as hotel and store. It was among first hostelries in Northern California. Notable guests, according to local tradition, included John C. Frémont, U. S. Grant, Governor Pío Pico, Kit Carson, Fighting Joe Hooker, William T. Sherman, Phil Sheridan, and members of the Bear Flag Party. 
Location: Sonoma State Historic Park, 133 E Spain St, Sonoma 

NO. 18 PETALUMA ADOBE - Vallejo’s Petaluma Adobe, Petaluma Adobe served as the center for General Mariano Guadalupe Vallejo’s 66,000-acre working rancho from 1836-1846.  It was once the largest privately owned adobe building in Northern California; Vallejo sold the building and surrounding acres in 1857.  The Native Sons of the Golden West acquired the Adobe in 1910 and the State of California obtained it in 1951. 
Location: Petaluma Adobe State Historic Park, 3325 Adobe Rd, Petaluma 

NO. 234 LUTHER BURBANK HOME AND GARDEN - In this garden Luther Burbank wrought with living plants to bring to the world greater fertility, wealth, and beauty, developing new varieties that produced better fruits and more beautiful flowers. 
Location: 200 block of Santa Rosa Ave, Santa Rosa 

NO. 237 TEMELEC HALL - This structure was erected in 1858 by Captain Granville P. Swift, a member of the Bear Flag Party, using stone quarried here by native Indian labor. General Percifor F. Smith, U.S. military commander in California, lived in the little house nearby in 1849. 
Location: Temelec Adult Community, 220 Temelec Circle, 3 mi SE of Sonoma 

NO. 316 PRESIDIO OF SONOMA (SONOMA BARRACKS) - Sonoma Barracks was erected in 1836 by General M. G. Vallejo. It became the headquarters of the Bear Flag Party, which in June 1846 proclaimed a 'California Republic' and raised the Bear Flag on Sonoma's Plaza. Twenty-three days later, on July 7, 1846, Commodore John Drake Sloat took possession of California for the United States government. Stevenson's Regiment, Company C, U.S.A., occupied the barracks in April 1847.
Location: Sonoma State Historic Park, NW corner of E Spain and 1st St E, Sonoma 

NO. 392 BUENA VISTA WINERY AND VINEYARDS - Founded in 1857, this is the birthplace of California wine. Its founder, Colonel Agoston Haraszthy, called the father of the state's wine industry, toured Europe in 1861 to gather grape vine cuttings, he also oversaw planting the vineyards and digging wine storage tunnels into the limestone rock of the hillsides. 
Location: 18000 Old Winery Rd, 2 mi NE of Sonoma 

NO. 392-1 SITE OF HARASZTHY VILLA - Here Count Agoston Haraszthy, 'Father of California Viticulture,' built an imposing villa in 1857-58, as his home. California's first formal Vintage Celebration, a masked ball, was held at this site on October 23, 1864. General and Mrs. Mariano Guadalupe Vallejo were guests of honor. While living here, Haraszthy oversaw operations of the Winery and Buena Vista Vinicultural Society. 
Location: Castle Rd near Buena Vista Winery, Sonoma 

NO. 496 SWISS HOTEL - The Swiss Hotel was constructed about 1850 by Don Salvador Vallejo. This adobe adjoined his first Sonoma dwelling, built in 1836. Occupied by various pioneers, in 1861 it was the house of Dr. Victor J. Faure, vintner of prize-winning wines made from the grapes of the Vallejo family vineyards. Later, it was used as a hotel and restaurant. 
Location: 18 W Spain St, Sonoma 

NO. 501 SALVADOR VALLEJO ADOBE - This was the home of Captain Salvador Vallejo, brother of General Mariano G. Vallejo, who founded Sonoma. The adobe was built by Indian labor between 1836 and 1846, and was occupied by Captain Vallejo and his family until the Bear Flag Party seized Sonoma on June 4, 1846. Cumberland College, a Presbyterian coeducational boarding school, was located here from 1858 to 1864. 
Location: 421-1st St W Sonoma

NO. 621 ITALIAN SWISS COLONY - Here in 1881 Italian immigrants established an agricultural colony. Choice wines produced from grape plantings from the Old World soon brought wide acclaim. By 1905, 10 gold medals had been awarded these wines at international competition. 
Location: 10 mi S on Asti Post Office Rd from Asti Rs, thru Winery Gates, plaque at office door,  Asti 

NO. 627 UNION HOTEL AND UNION HALL - The original hotel was a one-story adobe, the adjoining hall was a one-story frame structure. After the fire of 1866, a two-story stone hotel and a two-story frame hall with rooms upstairs for hotel guests were built. The Union Hotel was conducted as a hotel until 1955, when the Bank of America acquired the property. 
Location: 35 Napa and 1st St W Sonoma 

NO. 667 NASH ADOBE - This house was built by H. A. Green in 1847. Here John H. Nash was taken prisoner by Lieutenant William T. Sherman in July 1847 for refusing to relinquish his post as alcalde to Lilburn W. Boggs. The adobe was restored in 1931 by Zolita Bates, great-granddaughter of Nancy Patton Adler, who lived here after her 1848 marriage to Lewis Adler, pioneer merchant of San Francisco and Sonoma. 
Location: 579-1st St E, Sonoma 

NO. 692 HOOD HOUSE - This was the site of Rancho los Guilucos (18,833 acres), which Governor Juan Bautista Alvarado granted to John Wilson and his wife, Ramona Carrillo, sister-in-law of General Mariano Guadalupe Vallejo, in 1839. The house, constructed in 1858 by William Hood for his bride, Elsia Shaw of Sonoma, incorporates the original bricks fired on the property. The property was purchased in 1943 by the California Department of the Youth Authority for Los Guilucos School for Girls. 
Location: Hood Mansion, Santa Rosa Jr College, 7501 Sonoma Hwy (Hwy 12), Santa Rosa 

NO. 739 VINEYARD AND WINERY (SAN FRANCISCO SOLANO MISSION VINEYARD) - Here the Franciscan Fathers of San Francisco Solano de Sonoma Mission produced sacramental wine from the first vineyard in Sonoma Valley, planted in 1825. After secularization of the mission in 1835, General Mariano G. Vallejo, Commandant of Alta California's northern frontier, produced prize-winning wines from these grapes. A young immigrant from Italy, Samuele Sebastiani, with his wife Elvira, purchased this property in the early 1900s. Since that time, he and his family have continued with distinction the traditions handed down to them. Much of the original mission vineyard is still planted to choice wine grapes. 
Location: 394-4th St E at Spain St, Sonoma 

NO. 743 JACK LONDON STATE HISTORIC PARK - This is the 'House of Happy Walls,' built in 1919 by Charmian K. London in memory of her husband, renowned author Jack London. Here are housed many of his works and the collection gathered in their travels throughout the world. In 1960 Charmian's house, the ruins of Jack's 'Wolf House,' and his grave were presented to the State by his nephew, Irving Shepard. 
Location: Glen Ellen 

NO. 820 ST. TERESA'S CHURCH - Constructed of redwood in 1859 by New England ship's carpenters on land donated by Jasper O'Farrell, the church has served this coastal community continuously for over a century. Father Louis Rossi was appointed pastor on March 8, 1860, and Archbishop Alemany dedicated the church on June 2, 1861. 
Location: Bodega Hwy near Bodega Ln, Bodega 

NO. 833 BODEGA BAY AND HARBOR - Discovered in 1602-03 by Vizcaino's expedition, the bay was named by Bodega in his survey of 1775. The harbor was used in 1790 by Colnett and in 1809 and 1811 by the Kusov expeditions. The Russian-American company and their Aleut hunters used the bay as an outpost until 1841, Stephen Smith took control in 1843. Pioneer ships of many nations used Bodega Bay as an anchorage. 
Location: Doran Park, 1.6 mi W of State Hwy 1 (P.M. 9.4), on Doran Beach Rd, 0.5 mi S of Bodega Bay 

NO. 835 COOPER'S SAWMILL - In 1834, Mariano G. Vallejo's brother-in-law, John B. R. Cooper, constructed California's first known power-operated commercial sawmill. In addition to sawing redwood lumber, the mill and surrounding settlement served as a barrier to Russian encroachment from the west. Located on Mark West Creek, the waterpowered mill was destroyed by flood in the winter of 1840-41. 
Location: SW corner, intersection of Mirabel and River Rds (P.M. 174) near Mirabel Park, 8 mi W of Santa Rosa 

NO. 879 COTATI DOWNTOWN PLAZA - Cotati's hexagonal town plan, one of only two such in the United States, was designed during the 1890s by Newton Smyth as an alternative to the traditional grid. Each of the streets surrounding the six-sided town plaza, where early settler Dr. Thomas Page's barn once stood, is named after one of Page's sons, 'Cotati' derives from the name of a local Indian chief. 
Location: Downtown plaza, SE corner of Old Redwood Hwy and E Cotati Ave, Cotati

NO. 893 WALTERS RANCH HOP KILN - This is the most significant surviving example of a stone hop kiln in the North Coast region. Built by Angelo 'Skinny' Sodini in 1905, it served the Russian River Valley and North Coast regions, once the major hop-growing areas in the West. In the latter part of the 19th century, Sol Walters purchased 380 acres, part of the Sotoyome Rancho patented in 1853, from Josefa Fitch. 
Location: 6050 Westside Rd, Healdsburg 

NO. 915 PETRIFIED FOREST - The petrified forest, historically and scientifically significant as the state's only petrified forest dating from the Eocene period, is unique in its size, scope, and variety of petrification. Discovered in 1870, the forest is about a mile long by half a mile wide. 
Location: 4100 Petrified Forest Rd, 5 mi NW of Calistoga 

NO. 939 Twentieth Century Folk Art Environments (Thematic)-JOHN MEDICA GARDENS - 'Trying to make it look better,' John Medica spent 20 years transforming a barren hillside into a magical garden of plants and creative stone works. Castles were his greatest triumph. A native of Yugoslavia, self-taught, Medica created an oasis for people and animals to enjoy. This imaginative assemblage is one of California's remarkable Twentieth Century Folk Art Environments. 
Location: 5000 Medica Rd, off Stonespring Rd in a gated community, Santa Rosa 

NO. 981 ICARIA-SPERANZA COMMUNE - Icaria-Speranza was a Utopian community based on the writings of French philosopher Etienne Cabet. In 1881, at Cloverdale, French immigrant families led by the Dehay and Leroux families began their social experiment in cooperative living based on solidarity and depending on an agrarian economy. It lasted until 1886. Icaria-Speranza was the only Icarian Colony in California and the last of seven established throughout the United States. On this site stood the Icarian schoolhouse, deeded to the county in 1886. 
Location: W side of Asti Rd, 1.68 mi N of Asti Post Office Rd, S of Cloverdale

Source:  California State Parks - Office of Historic Perservation (http://ohp.parks.ca.gov/?page_id=21528)

Marin

NO. 207 FIRST SAWMILL IN MARIN COUNTY - This mill was erected by John Reed about 1833-34 on Rancho Corte Madera del Presidio- 'the wood cutting place for the Presidio'-present-day Mill Valley. Reed built the first house in Sausalito and the first ferryboat to ply San Francisco Bay.
Location: Old Mill Park, Throckmorton and Cascade Dr, Mill Valley, plaque located at NW corner of Blithedale Ave and Tower Dr 

NO. 210 OLDEST HOUSE NORTH OF SAN FRANCISCO BAY - This house was built in 1776 by the father of Camillo Ynitia or Unitia, the last chief of the Olompali Indians. The Indians were taught to make adobe bricks by Lieutenant Bodega and his party while they were surveying and charting the harbor of San Francisco Bay. The old adobe house is inside the house now on the site. (Burned in 1976.)
Location: Olompali State Historic Park, 8901 Redwood Hwy, State Hwy 101 (P.M. 24.8), 3.5 mi N of Novato

NO. 220 MISSION SAN RAFAEL ARCÁNGEL - The San Rafael Arcángel Mission, 20th in the chain of the 21 California missions, was established in 1817 by the Franciscan Order. After the 'decree of secularization' in 1834, the buildings gradually fell into ruin. The mission was reconstructed on the original site in 1949.
Location: 5th Ave and A St, San Rafael, plaque is at NE corner Merrydale and Southbound 101, San Pedro Rd offramp 

NO. 221 SITE OF THE LIGHTER WHARF AT BOLINAS - This wharf was built in the early 1850s to load lumber on lighters to be floated out to the deeper water near the channel, where it was transferred to seagoing vessels for shipment to San Francisco.
Location: At N end of Bolinas Lagoon at jct of State Hwy 1 (P.M. 170) and Olema-Bolinas Rd, 2 mi N of Bolinas 

NO. 222 LIME KILNS - Tradition is that the lime kilns were built by Russian stonemasons and worked by Indians during the Russian occupation of Sonoma County, which began in the spring of 1812. The Russians probably used the lime to whitewash their windmills, farm buildings, granaries, storehouses, and cattle yards, to tan hides, and to manufacture brick and tile.
Location: 300 ft W of State Hwy 1 (P.M. 22.1), 4.2 mi S of Olema 

NO. 529 ANGEL ISLAND - In 1775, the packet San Carlos, first known Spanish ship to enter San Francisco Bay, anchored in this cove. While here, the commander, Lieut. Juan Manual de Ayala, directed the first survey of the bay. This island, which Ayala named Isla de los Angeles, has been a Mexican rancho, a U.S. military post, a bay defense site, and a quarantine and immigration station.
Location: Hospital Cove, Angel Island State Park 

NO. 552 PIONEER PAPER MILL - The first paper mill on the Pacific Coast was built here in November 1856 by Samuel Penfield Taylor. Using water power and later steam, it was replaced in 1884 by a larger steam-powered mill nearby. This mill, closed by the depression of 1893, was destroyed by fire in 1915.
Location: 1.3 mi inside Samuel P. Taylor State Park, 18 mi W of Hwy 101 off Sir Francis Drake Blvd, County Hwy A104 (P.M. 171), Lagunitas

NO. 630 ST. VINCENT'S SCHOOL FOR BOYS - In 1853, Timothy Murphy, Irish-born pioneer of Marin County, gave 317 acres of land to Archbishop Alemany for educational purposes. Here the Sisters of Charity in 1855 founded a school that, as St. Vincent's School for Boys, has been maintained and enlarged by successive archbishops of San Francisco.
Location: 0.7 mi E of Hwy 101 on St. Vincent Dr, 4 mi N of San Rafael 

NO. 679 HOME OF LORD CHARLES SNOWDEN FAIRFAX - The home of 'Lord' Charles Snowden Fairfax, pioneer and political leader of the 1850s, who served California as an Assemblyman (1853), Speaker of Assembly (1854), and Clerk of the State Supreme Court (1856). A descendant of Scottish barons of the Cameron Fairfax family of Virginia, Fairfax was involved in the last of California's historic political duels as host to the principals and friend of the two antagonists.
Location: Marin Town and Country Club, one block S of intersection of Pastori Ave and Belmont Ave, Fairfax 

NO. 917 GREEN BRAE BRICK KILN - This brick kiln on the San Quentin Peninsula is the only surviving structure of the Remillard Brick Company, once the largest brick manufacturer on the Pacific Coast. During its 103 years of operation, its bricks were used to rebuild Ghirardelli Square, the Palace Hotel, and other San Francisco structures after the 1906 earthquake.
Location: 125 E Sir Francis Drake Blvd, Larkspur 

NO. 922 OUTDOOR ART CLUB - The Outdoor Art Club was designed in 1904 by Bernard Maybeck, internationally known American architect. Particularly notable for its unusual roof truss system, the building exemplifies Maybeck's creative use of natural materials. The Club, founded in 1902 by 35 Mill Valley women, is dedicated to preserving the area's natural environment.
Location: 1 W Blithedale Ave at Throckmorton, Mill Valley 

NO. 924 CHINA CAMP - One of the earliest, largest, and most productive Chinese fishing villages in California, China Camp was in operation by 1870. The Chinese immigrants and their descendants introduced the use of commercial netting to catch bay shrimp off Point San Pedro. The shrimp were then dried and exported to Chinese throughout the world. China Camp represents the last surviving Chinese shrimp fishing village in California.
Location: At entrance to China Camp Village, China Camp State Park, on N San Pedro Rd, 5.3 mi SE of State Hwy 101, Santa Venetia

NO. 974 GOLDEN GATE BRIDGE - Construction of the bridge started in 1933. Engineer Joseph Strauss and architect Irving Morrow created an extraordinarily beautiful bridge in an extraordinarily beautiful setting. The designs for the Golden Gate Bridge showed the greatest attention to artistic detail, especially on the two streamlined moderne towers. The bridge's 4,200 feet of clear span (from tower to tower) was the longest in the world until 1959. On April 19, 1937, the bridge was completed and the official dedication took place on May 27. 
Location: Observation area, N end of bridge

NO. 999 MARIN COUNTY CIVIC CENTER - The Civic Center Complex was designed by Frank Lloyd Wright (1869-1959) near the end of his long career. The administration Building was completed in 1962 and the Hall of Justice in 1970. They are the only government buildings designed by the distinguished architect that were ever actually constructed. The project fully embodied Wright's ideal of organic architecture-a synthesis of buildings and landscape. In Wright's words, the structures were planned to 'melt into the sunburnt hills.'
Location: Civic Center, San Rafael (plaque in storage, 3rd floor, County Counsel's Office)

Source:  California State Parks - Office of Historic Perservation (http://ohp.parks.ca.gov/?page_id=21429)