Beacon Rock State Park is a geologic preserve and public recreation area on Route 14 in the Columbia River Gorge National Scenic Area in Skamania County, Washington, United States. The park takes its name from Beacon Rock, an 848-foot (258 m) basalt volcanic plug on the north shore of the Columbia River 32 miles (51 km) east of Vancouver. On October 31, 1805, the Lewis and Clark Expedition arrived here and first measured tides on the river, indicating that they were nearing the ocean.