Cross-country skiing enjoys a reputation as "the world's best aerobic workout." Major international races draw as many as 18,000 competitors, but there are hundreds of local "citizen" races with several dozen racers.
International Competition The World Masters Cross-Country Ski Association sponsors the Masters World Cup, which, in 2016 was held in Vuokstti, Finland; the 2017 Masters World Cup took place in Klosters, Switzerland. The 2018 MWC will be held in Minneapolis, Minnesota. For more information see http://www.world-masters-xc-skiing.ch/mambo/index.php/english.html
The organization that promotes and supports cross-country skiing for Masters in the United States is American Cross-Country Skiers ("AXCS")
American Cross-Country Skiers
PO Box 604
Bend, Oregon 97709
Phone: (888) 543-7223