The 73,000 acres of Custer State Park provide habitat for one of the world's largest free roaming bison herds, numbering around 1500. Other large animals living in the park include elk, bighorn sheep, pronghorn antelopes, mountain goats, and deer.
Three scenic drives traverse the area. Needles Highway winds 14 miles through tunnels and spruce and pine forests. The 18-mile Wildlife Loop circles grasslands and pine-studded hills. Iron Mountain Road passes through the park's scenic northeast corner between Mount Rushmore and Hermosa.
The Peter Norbeck and Wildlife Station visitor centers have geological, historical, wildlife and forestry exhibits.
Seven campgrounds are found throughout the park. Reservations are accepted.