Biking the Badlands is not something I’ve had the opportunity to do myself. It seems a bit scary to me, as the main road through the park is narrow, curvy, and somewhat lacking in shoulder space in several areas. Here are some recommendations from the Park Service.
Bicyclist Warning: The Badlands Loop Road is narrow with many curves.
•Watch out for large RVs with extended mirrors.
•Bicycles are prohibited on park trails.
•Bicyclists are permitted on all park paved and unpaved roads and must obey all traffic regulations.
•Always ride with the flow of the traffic.
•Several steep passes make riding the Loop Road challenging.
•See and be seen. Wear bright colors and a helmet.
A map of suggested routes is available at the Ben Reifel Visitor Center.