Utah:

Bear Paw Ski Bowl
Big Mountain Resort
Big Sky Resort
Blacktail Mountain Ski Area
Bridger Bowl Ski Area
Discovery Basin Ski Area
Great Divide Ski Area
Lost Trail Powder Mountain
Marshall Mountain
Maverick Mountain Ski Area
Montana Snowbowl
Moonlight Basin
Red Lodge Mountain
Showdown Ski Area
Spanish Peaks
Teton Pass Ski Area
Turner Mountain
Yellowstone Club