Redfish Lake is an alpine lake in central Idaho, United States, located in the Sawtooth National Recreation Area, at the base of the Sawtooth Mountains in Custer County.
It is named for the brilliant sockeye salmon that once returned from the Pacific Ocean in such massive quantities that the lake shimmered red during spawning season. Currently, only a small percentage of the wild sockeye succeed in making through the several hydroelectric dams along their route back to the lake to spawn. Sockeye must not be targeted while fishing and must immediately be released if they are caught.
The surface elevation of Redfish Lake is 6,547 feet (1,996Â m) above sea level. The lake is 4.5 miles (7.2Â km) long and 0.72 miles (1.2Â km) wide, with a maximum depth of 387 feet (118Â m), and 11 miles (18Â km) of shoreline. The actual trail around the lake is 17.5 miles (28Â km) in length.
The average temperature of the lake ranges from freezing (32 °F, 0 °C) to a high of around 62 °F (16 °C) in late July & early August. In the winter the lake freezes over, with ice 30-36" (75â€"90 cm) thick.
The peaks which frame the lake at its south end are
- Mount Heyburn at 10,229Â ft (3,118Â m) to the west
- Grand Mogul at 9,733 feet (2,967Â m).
Redfish Lake is approximately five miles (8Â km) south of Stanley; a paved access road from State Highway 75 delivers motorists to the visitor area at the north shore of the lake.
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