Snow Mountain Ranch Half Marathon

2026

The Snow Mountain Ranch Half Marathon takes place in September at the YMCA of the Rockies in Granby, Colorado, covering 13.1 miles on entirely dirt trails. This out-and-back course with two lollipop sections climbs to 8,640 feet elevation, with the main challenge coming between miles 3-6 where runners gain most of the route's 1,707 feet of elevation. The course moves through high-altitude terrain in the Colorado Rockies, offering views of rolling hills and changing autumn colors. Runners will encounter dirt trails and grass sections throughout, with four aid stations providing support along the way. The September timing typically brings cooler mountain temperatures, though conditions can vary significantly at this elevation. This race suits runners comfortable with sustained climbing and high-altitude conditions. The generous time limit accommodates a range of paces, but the elevation gain and thinner air at altitude will challenge even experienced trail runners. Those who prefer flatter courses or struggle with elevation may find this more demanding than typical half marathons.