For many people, winter activities in Colorado often involve skiing/snowboarding. Listed below are a wide variety of ski resorts you may want to visit while in Fort Collins:
Arapahoe Basin
Aspen
Beaver Creek
Breckenridge
Copper Mountain
Crested Butte
Durango Mountain Resort
Eldora
Keystone
Loveland Ski Area
Sol Vista Basin
Vail
Winter Park