| Fallen Leaf Lake | |
|---|---|
 Fallen Leaf Lake in winter | |
  Fallen Leaf Lake  Fallen Leaf Lake | |
| Location | El Dorado County, California |
| Coordinates | 38°55′N 120°04′W / 38.92°N 120.06°W |
| Primary inflows | Glen Alpine Creek |
| Primary outflows | Taylor Creek |
| Basin countries | United States |
| Max. length | 2.9 mi (5 km) |
| Max. width | 1.0 mi (1.6 km) |
| Max. depth | 415 ft (126 m) |
| Surface elevation | 6,377 ft (1,944 m) |
Fallen Leaf Lake is a mountain lake located in El Dorado County, California, near the California–Nevada state border, about one mile south west of the much larger Lake Tahoe. It is approximately aligned north-to-south and oval in shape, measuring approximately 2.9 miles (4.6 km) on the long axis and 0.9 miles (1.4 km) on the short axis. The lake was created by at least two glaciers that traveled northward down the Glen Alpine Valley. If the glacier had continued instead of stopping, Fallen Leaf Lake would be a bay of Lake Tahoe, similar to nearby Emerald Bay. A terminal moraine is visible at the north end of the lake on the northeast edge.