Blowing snow and poor road conditions Thursday morning prompted Yellowstone National Park officials to temporarily close all interior roads. By midmorning, the route between West Yellowstone and Old Faithful had been re-opened to guided snowmobile and snow coach traffic, but the road conditions were poor. By afternoon, the road between Mammoth and Madison was open to snow coaches, but travel between Norris and Mammoth on snowmobiles was not advised because of icy conditions.
The road between the park's North Entrance at Gardiner through Mammoth Hot Springs, Tower Junction and the Northeast Entrance on to Cooke City remains open. Snow tires are required, and drivers are cautioned to look for drifting and animals near the roadway.
Updated road condition information is available 24 hours a day by calling 307-344-2117.