Embark on an unforgettable journey under the Colorado sky at the Chase the Moon 12-Hour Endurance Run, taking place on June 27, 2026, in Highlands Ranch, CO. This unique overnight ultramarathon challenges runners from 7 PM to 7 AM, offering both solo 12-hour endeavors and team relay options for 3 or 5 runners. Experience the stunning transformation of the Highlands Ranch Backcountry trail system as you begin under a beautiful Rocky Mountain sunset, continue through the night beneath the illumination of the moon, and finish with a breathtaking sunrise painting the foothills.

The course itself is a rolling 10.3-mile loop, comprised of 98% dirt trails with minimal technical difficulty. Each lap features approximately 870 feet of elevation gain, providing a constant yet manageable challenge as you navigate the wide-open and exposed terrain. Runners are required to use headlamps to light their way, though the course is exceptionally well-marked with reflective tape and glow sticks once darkness falls. Typical race day conditions in late June bring highs around 86°F and lows around 56°F, with a low 7% chance of precipitation, making for potentially cool night running after a warm start.

Renowned for its excellent organization and vibrant atmosphere, the Chase the Moon Endurance Run has been a fixture since 2014, earning accolades like "Best Race Shirt" in Competitor Magazine's "Best Of" runner poll from 2014-2016. Aid stations are strategically placed and celebrated for being well-stocked and supported by enthusiastic volunteers. Beyond the individual challenge, relay teams can even aim for the 100-Mile Challenge, offering a $500 cash prize for the first 3-person team to break 100 miles. Starting and finishing at Mountain Vista High School, this event promises not just a race, but a truly immersive and memorable overnight trail running experience.