Untamed. Untouched. Wild.Custer State Park in the Black Hills encompasses 71,000 acres of spectacular terrain and an abundance of wildlife. Within the park, you'll discover a world of adventure! Favorite outdoor activities include hiking 7,242-foot Harney Peak, mountain biking, horseback riding, rock climbing, fishing, chuckwagon suppers and jeep rides to see the bison.The park boasts scenic drives such as the Needles Highway (SD 87), which twists and turns its way past towering rock formations and through narrow tunnels. At the end of one tunnel stands the Needles Eye, a granite spire with a slit only 3 to 4 feet wide but reaching 30 to 40 feet in the air.