Illustration of Iron Mountain RoadIron Mountain RoadKEYSTONE · SOUTH DAKOTAIron Mountain RoadUS Hwy 16A, Keystone, SD 5775117 mi trails⭐ 4.92,820 reviews🥾 Trail🪢 Leash required👍 6.8🌳 Shade🅿️ Parking🚻 Restrooms Google Maps →Details →