Beacon Rock - Beacon Rock State Park, WA. Beacon Rock is a landmark in the Columbia River Gorge, named by Capt. Clark in his journal on November 2, 1805. At 800 ft. high, it is the world's second largest free-standing rock monolith. Beacon Rock is only a few miles downstream from the "Cascades," a section of the river running through an especially shallow and rocky area. Photo: ©Charley Van Pelt