
The road is famous for the "Pigtail Bridges" that allow travelers to drop or gain altitude quickly. The highway connects Custer State Park and Mount Rushmore National Memorial and passes through some of the most beautiful scenery in the Black Hills, including three tunnels that frame Mount Rushmore in the distance. The Iron Mountain Road is a work of art in itself. Scovel Johnson Tunnel, 10' 9" wide by 11' 0" high. Gideon Tunnel, 11' 6" wide by 10' 9" high Iron Mountain Roadĭoane Robinson Tunnel, 12' 0" wide by 11' 4" high Ĭ.C. The trail remains open for hikers, walkers, bikers and skiers. Needles Highway closes to vehicles with the first snow of the season and does not reopen until April 1, or later depending on conditions. Visitors traveling the highway pass Sylvan Lake and a unique rock formation called the Needle's Eye, named for the opening eroded by wind, rain, freezing, and thawing.


The roadway was carefully planned by former South Dakota Governor Peter Norbeck, who marked the entire course on foot and by horseback. The road's name comes from the needle-like granite formations, which seem to pierce the horizon along the highway. The Needles Highway is a spectacular drive through ponderosa pine and Black Hills spruce forests, meadows surrounded by birch and aspen, and rugged granite mountains.

Iron Creek Tunnel, 8' 9" wide by 10’10” high. Needles Eye Tunnel (Near Needle's Eye), 8' 9" wide by 9’8" high Scenic drives through Custer State Park Needles Highway
