Well, Colter Pass is free and clear. As are most roads through the Park, with the South Entrance (and the shortcut to Jackson Hole :) opening on Friday. Dunraven and the Beartooth Pass are planned to open May 22nd.
And on the east side, the West Fork of Rock Creek is good to go. And the Main Fork, drivable to within a mile of the Glacier Lake TH.
Pouring cold rain here in Cooke City at the moment for weather.!