Fort Clatsop was a wooden fort built by the Lewis and Clark Expedition in 1805-1806. Located near the mouth of the Columbia River in present-day Oregon, it served as the expedition's winter encampment. The fort was named after the local Clatsop Tribe, who inhabited the area. The structure consisted of a stockade with several rooms for sleeping, cooking, and storage. The expedition members faced harsh weather and limited resources during their stay, but Fort Clatsop allowed them to rest and prepare for their return journey. Today, it is a historical site managed by the National Park Service.