When was the American explorer which was accompanied by Lake Sacajawea during their exploration of the American West born?
Lake Sacajawea:  It is named for Sacajawea, a Shoshone woman who accompanied Meriwether Lewis and William Clark during their exploration of the American West. Meriwether Lewis: Meriwether Lewis (August 18, 1774 – October 11, 1809) was an American explorer, soldier, politician, and public administrator, best known for his role as the leader of the Lewis and Clark Expedition, also known as the Corps of Discovery, with William Clark.
August 18, 1774