United States

California
Bear Valley
Dodge Ridge
Donner Ski Ranch
Heavenly Mountain
Mt Baldy
Northstar at Tahoe
Sierra at Tahoe
Soda Springs

Colorado
Arapahoe Basin
Berthoud Pass
Buttermilk
Copper Mountain
Durango Mountain
Eldora
Keystone
Telluride
Vail
Winter Park

Idaho
Silver Mountain

Maine
Shawnee Peak

 Maryland
Ski Wisp

Massachusetts
Blue Hills
Wachusett Mountain

Minnesota
Spirit Mountain

Montana
Big Mountain
Blacktail Mountain
Great Divide
Showdown
Turner Mountain

Nevada
LasVegas Ski Resort

New Hampshire
Black Mountain
Cranmore
Crotched Mountain
Loon Mountain
Ragged Mountain
Waterville Valley

New Mexico
Angel Fire
Sipapu

Oregon
Hoodoo
Mount Hood SkiBowl

Utah
Beaver Mountain
Brian Head

Vermont
Sugarbush

Washington
Mt. Baker
The Summit at Snoqualmie

Wyoming
Grand Targhee

Canada

Alberta
Lake Louise
Marmot Basin
Sunshine Village

British Columbia
Whistler-Blackcomb
Panorama
Kicking Horse Mtn
Sun Peaks
Whitewater

Close to the border
Big Mountain

Possibilities:
These additional areas are unconfirmed...

Alberta
Canyon
Kinosoo Ridge
Rabbit Hill

British Columbia
Mount Baldy

 Manitoba
Asessippi

Saskatchewan
Table Mountain

Quebec
Mount Sutton
Mont Orignal
Valinouet