Lake Sacajawea
 |
- Not to be confused with Lake Sacajawea in Longview, Washington.
| Lake Sacajawea | |
|---|---|
 Overview of the lake in 2017 | |
  Lake Sacajawea  Lake Sacajawea | |
| Location | Franklin / Walla Walla counties, Washington, United States |
| Coordinates | 46°14′58″N 118°52′47″W / 46.24944°N 118.87972°W |
| 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.
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