Big Heart Lake
| Big Heart Lake | |
|---|---|
| Location | Alpine Lakes Wilderness, King County, Washington, United States |
| Coordinates | 47°34′37″N 121°19′05″W / 47.577°N 121.318°W |
| Type | Alpine Lake |
| Primary inflows | Glacial Runoff |
| Primary outflows | West Fork Foss River Tributary |
| Surface area | 175.9 acres (71.2 ha) |
| Surface elevation | 4,418 ft (1,347 m) |
Big Heart Lake is the most remote and highest-elevation on-trail lake in the West Fork Foss River system. It is a 14.6-mile (23.5 km) round-trip hike from the trailhead, just off of the Foss River Road. The lake is located at the eastern base of Camp Robber Peak in the Alpine Lakes Wilderness Area, within King County, Washington.
Reaching Big Heart Lake requires a significant elevation gain of over 3,000 feet from the trailhead, and the lake itself has a surface elevation of 4,418 feet.