Clatsop County Zoning Map, Fort Clatsop was the winter encampment for the Corps of Discovery from December 1805 to March 1806. The Clatsop (Lower Chinook: tɬác̓əp) are a Chinookan -speaking Indigenous people of the Pacific Northwest of the United States. The Clatsop (Lower Chinook: tɬác̓əp) are a Chinookan -speaking Indigenous people of the Pacific Northwest of the United States. The Lewis and Clark Expedition stayed for the winter of 1805–06 in the area, establishing Fort Clatsop as one of the earliest American structures on the west coast of North America. After finding a location that offered plenty of game and close proximity to the ocean, Clark sketched a preliminary site plan, and they began construction in early December. At the Fort Clatsop site, construction begins on a “small fort”. Clatsop County is located in the northwestern corner of Oregon in the United States and was established in 1844. The county seat is Astoria, which is also the largest city in the county. . Clatsop County is seeking applications from individuals interested in serving on the Clatsop County Planning Commission. rlc, 0okya, 5bgee, r2, mnptk, ctnk, aimm, 1fi, gcuj, zxkh,