Part of the goal with SlopeFillers is simply to provide resources, a central listing of information that marketers may need. This post is one of those. I know I have missed many, Google searches can only find so many of these associations.  If you know of any more, please let me know or just comment at the bottom of the post.

UNITED STATES

NATIONAL
US National Ski Areas Association
http://www.nsaa.org

MIDWEST
Midwest Ski Areas Association
http://www.snowplaces.com/

PACIFIC NORTHWEST
Pacific Northwest Ski Areas Association
http://www.pnsaa.org
Inland Northwest Ski Association
http://www.skinwrockies.com/

CALIFORNIA
California Ski Industry Association
http://www.californiasnow.com

COLORADO
Colorado Ski Country USA
http://www.coloradoski.com/

IDAHO
Ski Idaho
http://www.skiidaho.us/

MAINE
Ski Maine Association
http://www.skimaine.com/

MICHIGAN
Michigan Snowsports Industries Association
http://www.goskimichigan.com/

MINISOTA
Minnesota Ski and Snowboard Industry Inc.
http://www.skiandboardminnesota.com/

MONTANA
Montana Winter
http://wintermt.com/

NEW YORK
Ski Areas of New York Inc.
http://www.skiandrideny.com

NEVADA
Nevada Travel and Tourism
http://ski.travelnevada.com/

NORTH CAROLINA
North Carolina Ski Areas Association
http://www.goskinc.com/

OREGON
Ski Oregon
http://www.traveloregon.com/Ski-Oregon.aspx

PENNSYLVANIA
Pennsylvania Ski Areas Association
http://www.skipa.com/i

UTAH
Utah Ski Association
http://www.skiutah.com

VERMONT
Vermont Ski Areas Association
http://www.skivermont.com

WASHINGTON
Ski Washington
http://www.skiwashington.com/

WEST VIRGINIA
Ski West Virginia
http://www.westvirginiaski.com/
http://www.goskiwv.com

WISCONSIN
Wisconsin Ski Industries Association
http://www.skiingwisconsin.com/

CANADA

NATIONAL
Canada Snowsports Association
http://www.canadaskiandsnowboard.net/

ALBERTA
Alberta Alpine Ski Assoc
http://www.albertaalpine.ca/

BRITISH COLUMBIA
BC Alpine Ski Association
http://bcalpine.com/

SASKATCHEWAN
Saskatchewan Ski Association
http://www.saski.ca/

QUEBEC
Association des stations de ski du Québec
http://www.maneige.com/