Steamboat Rock is seen from SR 155 on the Coulee Corridor. Steamboat Rock is a long established area landmark, first used by nomadic Native American tribes and then by early settlers. The basalt butte rises 800 feet above Banks Lake. It was once an island in the Columbia River bed. When the Columbia returned to its natural course, after centuries of being dammed by ice, the massive rock remained. There is a Washington State Park featuring large campgrounds, day use areas, boat launches and hiking trails. The south end of the peninsula is managed as a wildlife area by Washington Department of Fish and Wildlife.