Tillamook Head is a high

promontory A promontory is a raised mass of land that projects into a lowland or a body of water (in which case it is a peninsula). Most promontories either are formed from a hard ridge of rock that has resisted the erosive forces that have removed the s ...

on the

Pacific coast Pacific coast may be used to reference any coastline that borders the Pacific Ocean. Geography Americas North America Countries on the western side of North America have a Pacific coast as their western or south-western border. One of th ...

of northwest

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

in the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. It is located in west-central Clatsop County, approximately 5 mi (8 km) southwest of Seaside. The promontory forms a steep rocky bluff on the ocean, approximately 1,200 ft (366 m) high, forested with

Sitka spruce ''Picea sitchensis'', the Sitka spruce, is a large, coniferous, evergreen tree growing to just over tall, with a trunk diameter at breast height that can exceed 5 m (16 ft). It is by far the largest species of spruce and the fifth- ...

. It is located in Ecola State Park. The promontory is named after the Tillamook, a

Salishan The Salishan languages ( ), also known as the Salish languages ( ), are a family of languages found in the Pacific Northwest in North America, namely the Canadian province of British Columbia and the American states of Washington, Oregon, Ida ...

-speaking tribe of Native Americans who inhabited the coast south of the promontory in the 19th century. In 1806, Captain

William Clark William Clark (August 1, 1770 – September 1, 1838) was an American explorer, soldier, Indian agent, and territorial governor. A native of Virginia, he grew up in pre-statehood Kentucky before later settling in what became the state of Misso ...

and 12 members of the

Corps of Discovery The Corps of Discovery was a specially established unit of the United States Army which formed the nucleus of the Lewis and Clark Expedition that took place between May 1804 and September 1806. The Corps was led jointly by Captain Meriwether Lewi ...

documented their journey south from

Fort Clatsop Fort Clatsop was the encampment of the Lewis and Clark Expedition in the Oregon Country near the mouth of the Columbia River during the winter of 1805–1806. Located along the Lewis and Clark River at the north end of the Clatsop Plains approxi ...

, hiking over the promontory where they encountered a beached

whale Whales are a widely distributed and diverse group of fully Aquatic animal, aquatic placental mammal, placental marine mammals. As an informal and Colloquialism, colloquial grouping, they correspond to large members of the infraorder Cetacea ...

. In 2002, the highest point on Tillamook Head was named

Clark's Mountain Clark's Mountain is a summit in Clatsop County, Oregon. It is named for William Clark (1770–1838), who during the Lewis and Clark Expedition, likely viewed the summit from the vicinity of Cape Disappointment. It is located in Ecola State Par ...

Geology

Tillamook Head is a tilted remnant of a flow of 15-million-year-old

Columbia River basalt The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt provinces on Earth, covering over mainly eastern Oregon and Washington, western Idaho, and part of northern Nevada. The ba ...

. The lava welled up near modern-day

Idaho Idaho ( ) is a landlocked U.S. state, state in the Pacific Northwest and Mountain states, Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington (state), ...

, and flooded down the

Columbia Gorge The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to deep, the canyon stretches for over as the river winds westward through the Cascade Range, forming the boundary between the state ...

. It spread along the

Oregon Coast The Oregon Coast is a coastal region of the U.S. state of Oregon. It is bordered by the Pacific Ocean to its west and the Oregon Coast Range to the east, and stretches approximately from the California state border in the south to the Columbia ...

to Tillamook Head, cooling to a 600-foot thick basalt sill.

References

External links

Ecola State Park: Official site
Headlands of Oregon Lewis and Clark Expedition Landforms of Clatsop County, Oregon {{ClatsopCountyOR-geo-stub

Geology

See also

References

External links