At least 13 protesters were arrested Friday after they blocked the highway that leads to Mount Rushmore for hours with disabled vehicles.
The group positioned white vans across the road and took the tires off, making it more difficult to remove them.
Tow trucks eventually removed the vehicles.
Law enforcement officers arrested over a dozen protesters who blocked Highway 16A, or Iron Mountain Road, according to the Sioux Falls Argus Leader.
Pepper spray was deployed during the clearing of the road.