| Lake Sacajawea | |
|---|---|
| Location | Franklin / Walla Walla counties, Washington, USA |
| Lake type | reservoir |
| Primary inflows | Snake River |
| Primary outflows | Snake River |
| Basin countries | United States |
Lake Sacajawea is formed by the Ice Harbor Dam on the Snake River. It stretches from there upstream to the Lower Monumental Dam. It is named for Sacajawea, a Shoshone woman who accompanied Meriwether Lewis and William Clark during their exploration of the American West.