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Over the last several years, snow biking has become a popular winter adaptation of the three season mountain bike here in Western Colorado. Snow bikes adapt to the winter condition with a wider tire, 3-4.5″ compared to the dry weather 2-2.5″ mountain bike tire. These wider tires are like balloon tires, using a lower pressure, like 10 psi, to enable the rider to manage riding on packed snow with traction. As snow bikes evolved to the larger tire size, the bike frame evolved to accommodate the new tire concept.
Many of the same trails used for snow shoeing and cross country skiing can be used for snow biking.
Snow Biking venus:
Crested Butte Nordic Center: the Crested Butte Nordic offers 13 kilometers of groomed trails that are open to fat biking and free to use. Trail Map
Roaring Fork Mountain Bike Association Trails
Grand Mesa Snow Biking: the Unite States Forest Service (USFS) prohibits snowbikes on the Skyway, County Line, and Ward Trail Systems. Snowbikes, also known as fat bikes, are typically allowed on snow packed roads and snowmobile trails. Trail Map
Town of Telluride Valley Floor Trail Map.