I just encountered this on the National Ski Areas Association website, and figured it was worth posting. So in case you're curious or have lost track, here's who owns what:
COLORADO
Aspen Skiing Company
Aspen Highlands, Colorado
Aspen Mountain, Colorado
Buttermilk, Colorado
Snowmass Ski Area, Colorado
Alterra Mountain Company
Squaw Valley | Alpine Meadows, California
Bear Mountain Resort, California
Blue Mountain, Ontario
Crystal Mountain, Washington
Deer Valley, Utah
June Mountain, California
Mammoth, California
Snow Summit, California
Snowshoe, West Virginia
Steamboat Ski & Resort Corporation, Colorado
Stratton, Vermont
Sugarbush, Vermont
Tremblant, Quebec
Winter Park Resort, Colorado
Mountain Capital Partners
Arizona Snowbowl, Arizona
Brian Head Resort, Utah
Nordic Valley Recreation, Utah (1)
Pajarito Mountain Ski Area, New Mexico
Purgatory Resort, Colorado
Ski Hesperus, Colorado
Sipapu Ski & Summer Resort, New Mexico
(1) Resort is operated under long-term agreement by Mountain Capital Partners. Resort is owned by Skyline Mountain Base, LLC.
Vail Resorts, Inc. (NYSE : MTN)*
Afton Alps, Minnesota
Alpine Valley, Ohio
Attitash, New Hampshire
Beaver Creek Resort, Colorado
Big Boulder Ski Area, Pennsylvania
Boston Mills/Brandywine, Ohio
Breckenridge Ski Resort, Colorado
Crested Butte Mountain Resort, Colorado
Crotched Mt. Ski Area, New Hampshire
Heavenly Mountain Resort, California/Nevada
Hidden Valley, Missouri
Hunter Mountain, New York
Jack Frost, Pennsylvania
Keystone Resort, Colorado
Kirkwood Mountain Resort, California
Liberty Mountain Resort, Pennsylvania
Mad River Mountain, Ohio (1)
Mount Brighton, Michigan
Mount Snow, Vermont
Mount Sunapee, New Hampshire
Northstar California, California (2)
Okemo Mountain Resort, Vermont
Paoli Peaks, Indiana
Park City Ski Area, Utah
Perisher Ski Resort, Australia
Ski Roundtop, Pennsylvania
Snow Creek Ski Area, Missouri
Stevens Pass, Washington
Stowe Mountain Resort, Vermont
Vail Mountain, Colorado
Whistler Blackcomb, British Columbia
Whitetail, Pennsylvania
Wildcat Mountain, New Hampshire
Wilmot Mountain, Wisconsin
(1) Resort is operated under long-term agreement by Vail Resorts, Inc. Resort is owned by EPR Properties.
(2) Resort is operated under long-term agreement by Vail Resorts, Inc. Resort is owned by EPR Properties.
MICHIGAN
Boyne USA, Inc.
Big Sky Resort, Montana
Brighton Ski Resort, Utah
Boyne Highlands Resort, Michigan
Boyne Mountain Resort, Michigan
Cypress Mountain, British Columbia
Loon Mountain, New Hampshire
Sugarloaf, Maine
Summit at Snoqualmie, Washington
Sunday River Ski Resort, Maine
Wisconsin Resorts. Inc.
Alpine Valley Resort, Wisconsin
Bittersweet Ski Area, Michigan
Mount Holly Ski Area, Michigan
Pine Knob Ski Area, Michigan
Searchmont Resort, Ontario
NEW YORK
State of New York
Belleayre Mountain (Olympic Regional Development Authority)
Gore Mountain (Olympic Regional Development Authority)
Whiteface (Olympic Regional Development Authority)
UTAH
Pacific Group Resorts, Inc.
Mount Washington Alpine Resort, British Columbia
Ragged Mountain Resort, New Hampshire (4)
Powderhorn Mountain Resort, Colorado
Wintergreen Resort, Virginia (5)
Wisp Resort, Maryland (5)
(4) Resort is operated under long-term agreement by Pacific Group Resorts, Inc. Resort is owned by RMR-Pacific LLC.
(5) Resorts are operated under long-term agreement by Pacific Group Resorts, Inc. Resorts are owned by EPR Properties.
Powdr Corp.
Boreal Ski Area, California
Copper Mountain Resort, Colorado
Eldora Mountain Resort, Colorado
Gorgoza Tubing Park, Utah
Killington, Vermont
Lee Canyon, Nevada
Mt. Bachelor, Oregon
Pico Mountain, Vermont
SilverStar Resort, Canada
Soda Springs Ski Area, California
Sinclair Oil Corporation
Snowbasin, Utah
Sun Valley, Idaho
CANADA
Mont Saint-Sauveur International Inc.
Edelweiss Valley, Ottawa
Mont-Avila Ski Area, Quebec
Mont Gabriel, Quebec
Mont Olympia, Quebec
Mont Saint-Sauveur Ski Area, Quebec
Ski Morin Heights, Quebec
Resorts of the Canadian Rockies Inc.
Fernie Alpine Resort, British Columbia
Kicking Horse Mountain Resort, British Columbia
Kimberley Alpine Resort, British Columbia
Mont-Sainte-Anne, Quebec
Nakiska Ski Area, Alberta
Stoneham Mountain Resort, Quebec
Source: National Ski Areas Association, Lakewood, Colo.
COLORADO
Aspen Skiing Company
Aspen Highlands, Colorado
Aspen Mountain, Colorado
Buttermilk, Colorado
Snowmass Ski Area, Colorado
Alterra Mountain Company
Squaw Valley | Alpine Meadows, California
Bear Mountain Resort, California
Blue Mountain, Ontario
Crystal Mountain, Washington
Deer Valley, Utah
June Mountain, California
Mammoth, California
Snow Summit, California
Snowshoe, West Virginia
Steamboat Ski & Resort Corporation, Colorado
Stratton, Vermont
Sugarbush, Vermont
Tremblant, Quebec
Winter Park Resort, Colorado
Mountain Capital Partners
Arizona Snowbowl, Arizona
Brian Head Resort, Utah
Nordic Valley Recreation, Utah (1)
Pajarito Mountain Ski Area, New Mexico
Purgatory Resort, Colorado
Ski Hesperus, Colorado
Sipapu Ski & Summer Resort, New Mexico
(1) Resort is operated under long-term agreement by Mountain Capital Partners. Resort is owned by Skyline Mountain Base, LLC.
Vail Resorts, Inc. (NYSE : MTN)*
Afton Alps, Minnesota
Alpine Valley, Ohio
Attitash, New Hampshire
Beaver Creek Resort, Colorado
Big Boulder Ski Area, Pennsylvania
Boston Mills/Brandywine, Ohio
Breckenridge Ski Resort, Colorado
Crested Butte Mountain Resort, Colorado
Crotched Mt. Ski Area, New Hampshire
Heavenly Mountain Resort, California/Nevada
Hidden Valley, Missouri
Hunter Mountain, New York
Jack Frost, Pennsylvania
Keystone Resort, Colorado
Kirkwood Mountain Resort, California
Liberty Mountain Resort, Pennsylvania
Mad River Mountain, Ohio (1)
Mount Brighton, Michigan
Mount Snow, Vermont
Mount Sunapee, New Hampshire
Northstar California, California (2)
Okemo Mountain Resort, Vermont
Paoli Peaks, Indiana
Park City Ski Area, Utah
Perisher Ski Resort, Australia
Ski Roundtop, Pennsylvania
Snow Creek Ski Area, Missouri
Stevens Pass, Washington
Stowe Mountain Resort, Vermont
Vail Mountain, Colorado
Whistler Blackcomb, British Columbia
Whitetail, Pennsylvania
Wildcat Mountain, New Hampshire
Wilmot Mountain, Wisconsin
(1) Resort is operated under long-term agreement by Vail Resorts, Inc. Resort is owned by EPR Properties.
(2) Resort is operated under long-term agreement by Vail Resorts, Inc. Resort is owned by EPR Properties.
MICHIGAN
Boyne USA, Inc.
Big Sky Resort, Montana
Brighton Ski Resort, Utah
Boyne Highlands Resort, Michigan
Boyne Mountain Resort, Michigan
Cypress Mountain, British Columbia
Loon Mountain, New Hampshire
Sugarloaf, Maine
Summit at Snoqualmie, Washington
Sunday River Ski Resort, Maine
Wisconsin Resorts. Inc.
Alpine Valley Resort, Wisconsin
Bittersweet Ski Area, Michigan
Mount Holly Ski Area, Michigan
Pine Knob Ski Area, Michigan
Searchmont Resort, Ontario
NEW YORK
State of New York
Belleayre Mountain (Olympic Regional Development Authority)
Gore Mountain (Olympic Regional Development Authority)
Whiteface (Olympic Regional Development Authority)
UTAH
Pacific Group Resorts, Inc.
Mount Washington Alpine Resort, British Columbia
Ragged Mountain Resort, New Hampshire (4)
Powderhorn Mountain Resort, Colorado
Wintergreen Resort, Virginia (5)
Wisp Resort, Maryland (5)
(4) Resort is operated under long-term agreement by Pacific Group Resorts, Inc. Resort is owned by RMR-Pacific LLC.
(5) Resorts are operated under long-term agreement by Pacific Group Resorts, Inc. Resorts are owned by EPR Properties.
Powdr Corp.
Boreal Ski Area, California
Copper Mountain Resort, Colorado
Eldora Mountain Resort, Colorado
Gorgoza Tubing Park, Utah
Killington, Vermont
Lee Canyon, Nevada
Mt. Bachelor, Oregon
Pico Mountain, Vermont
SilverStar Resort, Canada
Soda Springs Ski Area, California
Sinclair Oil Corporation
Snowbasin, Utah
Sun Valley, Idaho
CANADA
Mont Saint-Sauveur International Inc.
Edelweiss Valley, Ottawa
Mont-Avila Ski Area, Quebec
Mont Gabriel, Quebec
Mont Olympia, Quebec
Mont Saint-Sauveur Ski Area, Quebec
Ski Morin Heights, Quebec
Resorts of the Canadian Rockies Inc.
Fernie Alpine Resort, British Columbia
Kicking Horse Mountain Resort, British Columbia
Kimberley Alpine Resort, British Columbia
Mont-Sainte-Anne, Quebec
Nakiska Ski Area, Alberta
Stoneham Mountain Resort, Quebec
Source: National Ski Areas Association, Lakewood, Colo.