Coming events on a calendar maintained at nordicskating.org include the Quechee Winter Carnival and Dewey 's Pond Duathlon , Feb. 13 , with skating and rentals at Wilderness Trails Ski Shop in Quechee -LRB- 802-295-7620 -RRB- ; and the Spitz Sylvan Lake Ice Marathon , Feb. 24 to 26 between Calgary and Edmonton in Alberta , with tours and races on a 10-kilometer -LRB- six-mile -RRB- trail -LRB- www.slimarathon.com ; 403-886-2980 -RRB- .