Blue Sky Trail Marathon

Join us on 10/18/2026
(race date estimated)
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Blue Sky Trail Marathon Race Description

Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses take you on a north-south tour of the easternmost hogbacks of Northern Colorado’s Front Range mountains. With a moderate amount of elevation gain and loss and a variety of terrain, the route offers a little bit of something for everyone. It is designed to appeal to both veteran trail runners and those looking to experience their first trail racing adventure. The generous cut-offs should ensure a successful day for everyone.

The course is 100% dirt and 90% sweet Colorado singletrack. The terrain ranges in difficulty from smooth dirt trail to technical rock gardens. A small portion of the route is on dirt road (no motor vehicle access) and gravel trail, with the meat of the running done on the beautiful and distinctive redstone hardpack of the Blue Sky Trail.

After the race, kick back and enjoy the BBQ, awards and generous sponsor giveaways.


  • Blue Sky Trail Marathon Where & When
  • Location: 4780 W County Road 38E, Fort Collins, CO 80526
  • Race Date: 2025/10/18 07:00:00 AM (Saturday)

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Join us at the Blue Sky Trail Marathon in October for a great race. The Blue Sky Trail Marathon works hard to deliver you a memorable race experience. We would love to hear from you, so consider writing us a review.

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