• Autumn photo of Lake Clark and the Aleutian Range in Lake Clark National Park & Preserve

    Lake Clark

    National Park & Preserve Alaska

Faults

aerial view of a snow-covered volcano surrounded by rocky and snowy mountains

NPS Photo

A number of active fault underlie Lake Clark National Park and Preserve's rugged terrain. The longest, at 225 km, is the Lake Clark Fault which lies between the Alaska Range and the Chigmit Mountains, under the lake itself and Lake Clark Pass. To the east are the Telaquana and Mulchatna faults.

Did You Know?

Lake Clark is fed by snowfall and glaciers in the surrounding mountains.

Lake Clark is 1056 feet deep and covers 128 square miles. Thousands of years ago, the lake (and nearby Lake Iliamna) may have been open to salt water before being closed off by glacial outwash deposits.