Embark on an unforgettable trail adventure at the Blue Sky Trail Marathon & Half Marathon, set amidst the breathtaking landscapes of Fort Collins, CO, on October 18, 2026. This iconic event, renowned as Fort Collins's original and only trail marathon, offers an exhilarating half marathon distance of approximately 13.1 miles. Runners will traverse the stunning terrain between Horsetooth Mountain Park and the Devil's Backbone Open Space, journeying along the easternmost hogbacks of Northern Colorado's mighty Front Range.

The course is a true test of trail running prowess, boasting 100% dirt and roughly 90% "sweet Colorado singletrack" over its challenging 1,800 feet of elevation gain and loss. Expect a diverse route featuring everything from smooth dirt paths to technical rock gardens, all set against the backdrop of the distinctive redstone hardpack of the Blue Sky Trail. With a generous six-hour cut-off for the half marathon, it's designed to appeal to both seasoned trail runners and those looking to experience their first off-road race. Typical race day conditions in mid-October offer crisp autumn air, with highs around 63°F and lows around 35°F, and only a 5% chance of precipitation.

Aid stations, strategically placed along the course, are well-stocked with sports drink, gels, water, soda, a variety of fruits, and salty and sweet snacks, including gluten-free and vegan options upon request. Runners are required to be self-sufficient, carrying their own water bottles or hydration packs, as disposable cups are not provided. The race begins at the South Bay parking area, offering convenient drop bag access for half marathon participants. Upon crossing the finish line, celebrate your accomplishment with a post-race barbecue and take home unique finisher awards, making the Blue Sky Trail Half Marathon a truly memorable experience.