1. Crater Lake in Oregon, with a maximum depth of 1,943 feet (592 meters). Crater Lake is a caldera lake that formed when the top of a volcano collapsed after a violent eruption.
2. Lake Tahoe on the border of California and Nevada, with a maximum depth of 1,645 feet (501 meters). Lake Tahoe is a glacial lake located in the Sierra Nevada mountains.
3. Lake Chelan in Washington, with a maximum depth of 1,486 feet (453 meters). Lake Chelan is a glacial lake located in the North Cascades mountains.