Belleayre Mountain Big Boulder Ski Area Bromley Mountain & Sun Mountain Adventure Park Bronx River Parkway Reservation Campgaw Mountain - New Jersey Catamount Mountain Resort Cranberry Lake Preserve Croton Gorge Park Croton Point Park Girl Scouts Heart of the Hudson Hunter Mountain Ski Area and Resort Jack Frost Ski Resort, PA Jiminy Peak Mountain Resort Labrador Mountain Lenoir Preserve Magic Mountain McCauley Mountain Ski Resort Mohawk Mountain Mount Snow Mountain Creek Resort, NJ National Park Service Oak Mountain Ski Resort Okemo Mountain Resort Pico Mountain Ski Resort PINERIDGE Cross Country Ski Area Plattekill Mountain Powder Ridge Mountain Park and Resort Shawnee Mountain Area, PA Ski Sundown Stowe Mountain Resort Stratton Mountain Ski Resort Thunder Ridge Ski Titus Mountain Family Ski Center Town of Lewisboro Town of Yorktown Trailside Nature Museum Whiteface Mountain Willard Mountain Windham Mountain