The Big Sky Trail dy-logo-cropped Previous Next Place Categories: Snowmobile Trails InformationPhotosThe Big Sky Trail provides some of the best backcountry snowmobiling in Montana. This challenging 110-mile trail begins just north of West Yellowstone. While the first portion is groomed, the trail quickly turns into an un-groomed powder experience. This area has open bowls, deep fields of snow, and outstanding hill climbing opportunities. Trail Categories Snowmobile Trail Condition Groomed Ungroomed Marked Highest Elevation feet Elevation Gain feet Roundtrip Distance miles Organization Hebgen Lake District of the Custer-Gallatin National Forest Website Phone: (406) 823-6961 dy-logo-cropped Previous Next