Visit our YouTube channel to see videos of conditions at the pit. The pit is located just south of Rapid City, South Dakota as you entered into the Black Hills National Forest off of Hwy 16. Highway 16 is the main gateway to Mt. Rushmore and Crazy Horse Memorials, Custer State Park and Black Hills National Forest. More than 2500+ people travel this road daily according to SD DOT statistics and the highest travel occurs during the summer months.