Groomed roads close at 9 p.m. to oversnow vehicles (snowmobile and snowcoach) on the following schedule as spring plowing begins. These dates are all weather-dependent.
March 6, 2005 - Mammoth to Norris road will close to oversnow vehicle (snowmobile and snowcoach) traffic for spring plowing.
March 8, 2005- Madison Junction to Norris and Norris Junction to Canyon Roads close.
March 13, 2005 - All other groomed park roads close to oversnow traffic.
Roads close at 9:00 p.m. on the days listed above.
For more information about oversnow vehicle use in Yellowstone, visit our Winter Use page.
Spring weather is unpredictable; roads may be closed temporarily by snow or other weather conditions. Snow tires or chains may be required. Weather and snow conditions permitting, tentative road opening dates for vehicles are at 8:00 a.m. on the following schedule:
April 22, 2005 West side roads: Mammoth to Norris Junction to Madison Junction to Old Faithful; Madison Junction to West Entrance; Norris to Canyon.
May 6, 2005 Canyon to Lake to East Entrance.
May 13, 2005 Lake to South Entrance, West Thumb to Old Faithful, Tower to Tower Fall.
May 27, 2004 Weather permitting, Beartooth Pass (Highway 212 - outside the Northeast Entrance to the park) opens.
Closed for roadwork: Dunraven Pass, Chittenden Road south to Canyon. See road construction.
North Entrance to Northeast Entrance at Silver Gate and Cooke City, Montana is open all year. Please note that this road is closed to east / west travel just east of Cooke City from late fall to early spring.
The scheduled opening dates in May are the earliest possible dates; some routes may actually open later. Please call: 307-344-7381 or check locally to verify openings tentatively scheduled throughout the month of May. Some roads will also open, as conditions allow, for Hiking and Spring Bicycle travel beginning at the end of March.
Once an entrance road opens, it is open 24 hours. The only exceptions are caused by road construction and weather-related restrictions.
Please refer to our Opening and Closing Dates for Facilities and Road Construction Schedule for information regarding closures not related to the weather.