From the day Yellowstone National Park closes to over snow traffic (March 15, weather dependent) to the third Thursday in April, some of the park roads are open to non-motorized traffic.  Park crews plow the roads and administrative travel is permitted.  Biking, walking, jogging, roller blades, etc are allowed without a fee from the West Yellowstone entrance to Mammoth as conditions allow. The road between Madison Junction to Old Faithful is closed to non-motorized traffic in the spring for bear management.  Additionally, cyclists may enjoy a brief period of bicycle-only access in May on the East entrance to Slyvan Pass and the South entrance.  The road from Gardiner to Cooke City is open all year round to vehiles and bicycles, weather permitting.

Please note the weather is unpredictable, and there is usually a head wind on the return trip from Madison Junction to the West Entrance.  There are no services available and riders must pack in/pack out all supplies.  Please ride single file, carry bear spray, and give a wide berth or turn around when encountering wildlife.  Non-motorized users may encounter vehicles and plows on the roads. 

Important Spring Dates:

  • March 15:  All groomed roads in the park are closed
  • Third week in March:  The West Entrance often opens for spring biking, see map below.  (third week in March- Generally the date the West entrance is open to non-motorized traffic. Please contact the YNP Visitor Services Center at 307-344-2107 for the exact opening date.) 
  • April 20: Some roads open to vehicular traffic.  Please contact the YNP Visitor Services Center at 307-344-2107 for the most up to date information.


Information on cycling in Yellowstone National Park can be found at and

Map and more info can be found at