Ultramarathons in Grand Mesa

Saturday, July 25 · Grand Mesa, Colorado

The Grand Mesa Ultras 50 Miler takes place in July on Colorado's Grand Mesa, offering a high-altitude summer challenge with a 14-hour cutoff. The course follows an out-and-back format with what appears to be multiple loops, visiting key landmarks like Crag Crest and Flowing Park twice before finishing back at Mesa Top. Running at elevation in mid-summer Colorado means warm days, potential afternoon thunderstorms, and the kind of altitude that can catch flatlanders off guard. The course moves through varied terrain typical of the Grand Mesa—expect transitions between forested sections and more open areas, with the Crag Crest portion likely offering ridgeline running and wider views. Seven aid stations provide regular support, though the specific climbing profile and technical difficulty aren't immediately clear from available course details. This race suits runners comfortable with altitude, summer heat, and longer efforts without pacing support (pacers aren't permitted for the 50-miler). The July timing means you'll get Colorado's high country in full summer mode, but also the weather variability that comes with it. Runners who thrive on sustained efforts and don't mind some uncertainty about afternoon conditions will find this appealing.