The Lewis and Clark Expedition starts their return trip to St. Lewis on March 23, 1806 after spending the 1805–1806 winter at "Fort Clatsop" near the mouth of the Columbia River, in today's Oregon State, close to the city of Astoria; where the Expedition built the fort, which served as their encampment until their return.
The Fort encampment was named after the Clatsop local Native Americans who advised Lewis and Clark as to the best location for them to build their Winter encampment. The fort had been built in just over three weeks after their arrival on December 8, 1805.
