Big Ridge State Park is a state park in Union County, Tennessee, in the southeastern United States. The park consists of 3,687 acres on the southern shore of the Norris Reservoir, an impoundment of the Clinch River created by the completion of Norris Dam in 1936. Much of the park's recreational focus is on Big Ridge Lake, a 45-acre sub-impoundment of Norris near the center of the park.