Sacagawea (also Sakakawea, Sacajawea; see below) (c. 1788 – December 20, 1812; see below for other theories about her eath) was a Shoshone woman who accompanied the Lewis and Clark Expedition, led by Meriwether Lewis and William Clark, in their exploration of the Western United States. She traveled thousands of miles from North Dakota to the Pacific Ocean between 1804 and 1806. She was nicknamed Janey by Clark.