| Diablo Lake | |
|---|---|
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  Diablo Lake  Diablo Lake | |
| Location | Ross Lake National Recreation Area, Whatcom County, Washington, United States |
| Coordinates | 48°42′51″N 121°7′52″W / 48.71417°N 121.13111°W |
| Type | reservoir |
| Basin countries | United States |
| Surface elevation | 1,201 feet (366 m) |
Diablo Lake is a reservoir in the North Cascade mountains of northern Washington state, United States. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River at an elevation of 1,201 feet (366 m) above sea level.[1] Diablo Lake is part of the Skagit River Hydroelectric Project and managed by Seattle City Light.