|— Region of California —|
The Lost Coast is a mostly undeveloped section of the California North Coast in Humboldt and Mendocino Counties, which includes the King Range. It was named the "Lost Coast" after the area experienced depopulation in the 1930s. In addition, the steepness and related geo-technical challenges of the coastal mountains made this stretch of coastline too costly for state highway or county road builders to establish routes through the area, leaving it the most undeveloped and remote portion of the California coast. Without any major highways, communities in the Lost Coast region such as Petrolia, Shelter Cove, and Whitethorn remain secluded from the rest of California.
The region roughly spans from Rockport to Ferndale. At the south end, State Route 1, which runs very close along the coast for most of its length, instead turns inland at Rockport before merging with U.S. Route 101 at Leggett. At the north end, State Route 211 begins its journey at Ferndale, heading towards Highway 101 in Fernbridge. Section 511 of the California Streets and Highways Code still says that "Route 211 is from Route 1 near Rockport to Route 101 near Fernbridge", but it is very unlikely that the portion south of Ferndale will ever get built. Most of the region's coastline is now part of either Sinkyone Wilderness State Park or King Range National Conservation Area.
The Lost Coast consists of undivided Cretaceous marine metasedimentary and sedimentary rocks of the North American Plate steeply uplifted by Mendocino Triple Junction interactions with the Pacific Plate and Gorda Plate. The Lost Coast includes Tertiary marine sedimentary formations north of the Mattole River and a portion of the Franciscan Assemblage called Point Delgada at Shelter Cove. The steepness of uplift has created a coastal ridge forming a drainage divide parallel to the coast. The drainage pattern between Usal Creek and the Mattole River is a series of short streams with steep channel gradients.
Humboldt County 
Because of the rugged and remote location, the small towns of Shelter Cove, Whitethorn and Petrolia are popular with those looking for quiet respite. The area is known for its black sand beaches, which get their color from the significant tectonic activity of one continental and two oceanic plates meeting just offshore:
A common misconception about this black sand beach is that it is volcanic in origin. Actually, the sand comes from the dark colored sandstone called greywacke and an older compressed shale.—Black Sands Beach Head Tourist Information Placard, 
Mendocino County 
Early European settlers of this area began harvesting bark of the tanoak tree for tanning hides into leather. Bark collectors formed the small community of Kenny around springs at the headwaters of the north fork of Usal Creek. A wharf was built at Bear Harbor in 1884 for loading bark onto ships. The Bear Harbor and Eel River Railroad incorporated in 1896 to connect the wharf to a sawmill being built on the South Fork Eel River at Andersonia, California. The location of the railroad shops was named Moody for the proprietor of a nearby hotel and saloon. The community of Andersonia, Anderson Gulch, and the Anderson Cliffs of the lost coast are named for sawmill owner Henry Neff Anderson, who was killed in a construction accident in 1905. Sawmill and railroad operation languished after Anderson's death, and the facilities were dismantled in 1921.
Usal Redwood Company built a sawmill and 1600-foot (480 meter) wharf at the mouth of Usal Creek in 1889. The company town of Usal was built around the mill and a railroad for transporting logs extended three miles up Usal Creek. A fire in 1902 destroyed the sawmill, schoolhouse, warehouse, and county bridge over Usal Creek. The railroad was dismantled; but a few structures, including a hotel, survived until destroyed by fire in 1969. Steep terrain and unfavorable coastal mooring conditions delayed timber harvesting of Jackass Creek drainage until internal combustion machinery was available for transport. The company town of Wheeler, California, was built for logging operations from 1948 to 1959. Sinkyone Wilderness State Park began acquisition of lost coast property in 1975.
The geology of the Lost Coast has made it very difficult to establish routes through the area. State Route 1, California's Pacific Coast Highway, was originally planned to also follow up the coast through the region. In 1984, admitting that such construction was not feasible, the northern segment of Highway 1 from Rockport was re-routed to Leggett, while the portion that was built from Ferndale to Fernbridge was renumbered as State Route 211.
Without any major highways or county thoroughfares in the area, the secluded communities within the Lost Coast are only accessible by land via small mountain roads. Mattole Road runs south from Ferndale to Petrolia, while Shelter Cove and Briceland Thorn Roads form the main route connecting Shelter Cove with US 101 to the east.
Shelter Cove Airport in Shelter Cove is a small public airport with only one runway, making it a popular fly-in destination when weather permits, and those communities right on the coast are still accessible by boat.
- Gudde, Erwin G.; Bright, William (2004). California Place Names: The Origin and Etymology of Current Geographical Names (4th ed.). University of California Press. ISBN 978-0-520-24217-3.
- "King Range National Conservation Area". Bureau of Land Management. Retrieved 2009-03-08.
- Strand, Rudolph G. Geologic Map of California:Redding Sheet (1962) State of California Resources Agency
- Jennings, Charles W. and Strand, Rudolph G. Geologic Map of California:Ukiah Sheet (1960) State of California Resources Agency
- (Information placard) Lost Coast Black Sands information. Black Sands beach head, near Shelter Cove, CA: Bureau of Land Management - Kings Range National Conservation Area. Date not discernible from placard.
- Carranco, Lynwood (1982). Redwood Lumber Industry. Golden West Books. pp. 208–209. ISBN 0-87095-084-3.
|Wikimedia Commons has media related to: Lost Coast|
- National Geographic - Adventure Guide to Lost Coast, California
- GearJunkie - Video on Lost Coast trek