Steamboat Rock NPS/Handke. Address: 51052 WA-155, Electric City, WA 99123. 'Dominating the landscape is a columnar, basaltic rock with a surface area of 600 acres. Three campground areas and a large day-use area are on sweeping green lawns, protected from winds by tall dramatic poplars. The surrounding areas are carpeted with wildflowers, adding to the gray-green brush of the Scablands.'