Are there any really good mountain biking trails in Fort Collins?

Yes, there are some great mountain bike trails in Fort Collins! Blue Sky Trail (just south of Horsetooth Reservoir) is a really fun, roly-poly trail with some technical sections too. Also, there are some nice trails in Lory State Park.

Depends on your definition of mountain biking - if you're looking for really hilly, mountainous rides, you'll have to head for the mountains for that! However, there are still a lot of great bike trails to help you get around town within the city limits. Here's a link to the City's site for the bike trails: http://www.fcgov.com/bicycling/

Here you can find the most current bike trail maps, see upcoming events, closures, and future expansions for the bike trails system!