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 so ...

on the

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

coast of northwest

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. 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. It is located in

Ecola State Park Ecola State Park is a state park located approximately 3 miles north of Cannon Beach in Clatsop County in the U.S. state of Oregon on the Oregon Coast. It is administered by the Oregon Parks and Recreation Department. The park encompasses of c ...

. The promontory is named after the

Tillamook Tillamook may refer to: Places: * Tillamook County, Oregon, United States * Tillamook, Oregon, a city, the seat of Tillamook County * Tillamook River, United States * Tillamook Bay, a bay in the northwestern part of Oregon * Tillamook Head, a natu ...

, a

Salishan The Salishan (also Salish) languages are a family of languages of the Pacific Northwest in North America (the Canadian province of British Columbia and the American states of Washington, Oregon, Idaho and Montana). They are characterised by ...

-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 Lew ...

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 approxim ...

, hiking over the promontory where they encountered a beached

whale Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and ...

Geology

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

Columbia River basalt The Columbia River Basalt Group is the youngest, smallest and one of the best-preserved continental large igneous province, flood basalt province on Earth, covering over mainly eastern Oregon and Washington (state), Washington, western Idaho, a ...

. The lava welled up near modern-day

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

, 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 sta ...

. 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