Lake Crescent - Origins

Origins

The lake was formed when glaciers carved out deep valleys during the last Ice Age. Initially, the Lake Crescent valley drained into the Indian Creek valley and then into Elwha River. Anadromous fish such as steelhead and coastal cutthroat trout migrated into the valley from lower waters.

Approximately 8,000 years ago, a great landslide from one of the Olympic Mountains dammed Indian Creek and the deep valley filled with water. Many geologists believe that Lake Crescent and nearby Lake Sutherland formed at the same time, but became separated by the landslide. The results of the landslide are easily visible from the summit of Pyramid Mountain. Eventually, the water found an alternative route out of the valley, spilling into the Lyre River, over the Lyre River Falls, and out to the Strait of Juan de Fuca.

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