09/16/2026
Scovel Johnson Tunnel, South Dakota, USA 🇺🇸
Scovel Johnson Tunnel in South Dakota is a historic passage along the scenic Iron Mountain Road near Custer State Park. Carved through solid rock, the narrow tunnel is part of a famous drive featuring winding roads, pigtail bridges, and dramatic Black Hills scenery. It was designed as part of a route that frames distant views of Mount Rushmore, giving travelers a memorable mix of engineering, history, and mountain beauty.