Bicycling
Bicycles are not available for rent at the park. If you plan to bring one, remember it is subject to the same traffic rules as automobiles. Bicycling is permitted on established public roads, parking areas, and designated routes. Bikes are prohibited on backcountry trails and boardwalks.
Use extreme caution when riding on park roads; roads are winding and narrow while shoulders are either narrow or nonexistent. Vehicle traffic is heavy most of the time. There are no bicycle paths along roadways. We strongly recommend that safety gear, including helmet and high visibility clothing, be worn by all bicyclists. During April, May, and June, high snowbanks make travel more dangerous. Road elevations range from 5,300 to 8,860 feet (1615 to 2700 meters), and services and facilities are relatively far apart--typically 20 to 30 miles (37 to 56 kilometers).
Motorists frequently do not see bicyclists or fail to give them sufficient space on the road. Drivers sometimes pass on hill crests, blind curves, or in oncoming traffic. Vehicles, especially motor homes or those towing trailers, may have wide mirrors, posing an additional hazard. For more information about bicycling, stop at a visitor center.
Some commercial businesses are permitted to offer guided bicycle trips in Yellowstone National Park.