I think this is an incomplete, out of date list.
Mountainview DGC
Sunrise Ski Resort
Arizona Snowbowl
Mountain View City Park
Little Mountain DGC-Q.E. Park
Toney's Mountain Golf
Kirkwood Mountain Resort
Mountaineer DGC
Fire Mountain DGC
Aspen Mountain
Rocky Mountain Village DGC
Copper Mountain Resort
Durango Mountain Resort
Snowmass Ski Resort - Red
Snowmass Ski Resort - Yellow
Colorado Mountain College, Glenwood
Colorado Mountain College, Leadville
Apple Mountain
Schweitzer Mountain Resort
White Mountain Rec Center
Chestnut Mountain Resort
Rocky Mountain @ Seacoast
Eaton Mtn. Ski Area
Wisp Deep Creek Ski Resort
Boyne Mountain
Silver Mountain
Crystal Mountain
Keweenaw Mountain Lodge
Indianhead Mountain
Hyland Ski & Snowboard Area
Ozark Mountain
Blue Mountain
Sheep Mountain
Whitefish Mountain Resort DGC
Snow Bowl Ski Area
Bohart Ranch X-C Ski Center
Mountain Crest Park
Wildcat Mountain Alpine DGC
Taos Ski Valley DGC
Sipapu Ski & Summer Resort
Red River Ski Area
Elk Mountain Disc Golf
Black Mountain
Flat Mountain DGC
Mt. Hood Skibowl
CBK Mountain Adventures Disc Golf
Blue Mountain - Skyline Park
Blue Mountain - Valley Park
South Mountain DGC
Seven Springs Mountain Resort
French Creek - Pleasure Mountain
Mountain View Park DGC
Roan Mountain DGC
Mountain Creek
Snowbasin
Solitude Mountain Resort
Mountain High
Mountain Lake DGC
Marshmallow Mountain
Crystal Mountain - Base Course
Crystal Mountain - Summit Course
Nordic Mountain Ski Area