Summit County is a trail runner’s playground. Our vast trail network offers the perfect destination for both the veteran runner training for their next big race and the new runner eager to explore trails for the first time (and everyone in between). Let our local expert running guides tailor a run to your desired mileage, duration, and degree of difficulty while ensuring you’ll see the amazing mountain terrain you can only see in Summit County. Or join a guided group run to run in the company of like-minded trail explorers while enjoying the support and educational opportunities a guide provides. No matter how you choose to trail run with Colorado Adventure Guides, expect fantastic trail in beautiful places, tips on equipment and technique, and a fun time exploring while we eliminate the guesswork.