Tillamook Head


Tillamook Head is a high promontory on the Pacific coast of northwest Oregon in the United States. It is located in west-central Clatsop [County, Oregon|Clatsop County], approximately 5 mi southwest of Seaside. The promontory forms a steep rocky bluff on the ocean, approximately 1,200 ft high, forested with Sitka spruce. It is located in Ecola State Park.
The promontory is named after the Tillamook, a Salishan-speaking tribe of Native Americans in [the United States|Native Americans] who inhabited the coast south of the promontory in the 19th century. In 1806, Captain William [Clark (explorer)|William Clark] and 12 members of the Corps of Discovery documented their journey south from Fort Clatsop, hiking over the promontory where they encountered a beached whale.
In 2002, the highest point on Tillamook Head was named Clark's Mountain.

Geology

Tillamook Head is a tilted remnant of a flow of 15-million-year-old Columbia [River basalt]. The lava welled up near modern-day Idaho, and flooded down the Columbia Gorge. It spread along the Oregon Coast to Tillamook Head, cooling to a 600-foot thick basalt sill.