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Steamboat Rock

Steamboat Rock, which rises 525 feet in the flood chasm called the Grand Coulee, was once surrounded by the Ice Age Columbia River that ran here. The land is now Steamboat Rock State Park, where hikers can climb to the top and see the former flood and river course. The rock is bounded on three sides by Banks Lake, used to store irrigation water. (Steve Ringman / The Seattle Times)

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Filename: Steamboat Rock
Copyright: The Seattle Times
Image Size: 3504x2336 / 1.4MB; Climate Columbia River Eastern Washington Ice Age floods glacial lakes ice plugs water silt debris Banks Lake Grand Coulee Steamboat Rock State Park
Contained in galleries: Eastern Washington, The Natural World

Steamboat Rock, which rises 525 feet in the flood chasm called the Grand Coulee, was once surrounded by the Ice Age Columbia River that ran here. The land is now Steamboat Rock State Park, where hikers can climb to the top and see the former flood and river course. The rock is bounded on three sides by Banks Lake, used to store irrigation water. (Steve Ringman / The Seattle Times)