Indigo Lake or simply Indigo is a lake lying ten miles southeast of central Sitka, on the western coast of Baranof Island in the Alexander Archipelago of Alaska.[1]

Indigo Lake
Indigo Lake in mid-spring
Indigo Lake is located in Alaska
Indigo Lake
Indigo Lake
LocationBaranof Island, Sitka City and Borough, Alaska, US
Coordinates57°00′50″N 135°03′53″W / 57.01389°N 135.06472°W / 57.01389; -135.06472
TypeGlacial lake, tarn
Basin countriesUnited States
Max. length0.8 mi (1.3 km)
Max. width0.5 mi (0.80 km)
Surface elevation2,448 ft (746 m)

The name was reported in 1954 by local Sitkan Robert N. DeArmond to the USGS and was so named because its intensely and mysteriously indigo blue color. The lake about eight tenths of a mile across and long (a circular shape) with very steep and cliffed walls.

The southern ridge of Indigo Lake plays an important part in the trail to Peak 5390.

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