Blue Sky Trail Marathon

The Blue Sky Trail Marathon & Half, held in October 2025 near Fort Collins, Colorado, offers challenging trail races through the scenic eastern hogbacks of Northern Colorado’s Front Range. The marathon covers 26.7 miles with 3,500 feet of elevation gain, while the half marathon spans 13.4 miles with 1,800 feet of gain. The course features 90% singletrack trails, including dirt and rocky sections, with stunning views and diverse terrain suitable for both experienced trail runners and newcomers.

Aid stations provide nutrition and hydration, and the event emphasizes a supportive atmosphere with generous cut-off times, awards, and post-race meals. The race is capped at 400 participants per distance. Visit the organization's website for the most recent information.