Byers Peak Stampede Half Marathon

Boulder XC Series Meet 1 is a family-friendly cross-country event held at Valmont City Park (South) in Boulder, Colorado (5110 Valmont Rd). The meet offers three distances: 1K for younger runners, 3K for those up to 16, and a 5K open race, welcoming participants of all ages and abilities. It’s the f..

The Colleen De Reuck XC Classic is a cross country running event held annually at Harlow Platts Community Park in Boulder, Colorado. Honoring renowned distance runner Colleen De Reuck, the race promotes health, fitness, and celebrates local Olympians, with 2025 honoring 2012 Olympic marathoner Yoshi..

USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University at Snow Mountain Ranch Nordic Center in Granby, Colorado, on January 24–25, 2026, brings collegiate teams together with junior skiers for a two-day Nordic festival. Races include a 15 km classic (collegiate and independent h..

Race The Ranch is a snowshoe race held at the Snow Mountain Ranch YMCA property in Granby, Colorado on April 4, 2026. The event offers three distances: 50k 25k 5k The 50k route uses less-known trails on the property and includes Pete's Loop. Course maps and stated elevation gains are: 5k one lap..

Summits Trail Runs, the 2nd Annual edition of the Human Potential Running Series, unfolds at Granby Ranch Resort in Colorado’s Rocky Mountains (Granby, CO). The race weekend offers several distances: Elevation Challenge (a 32-hour ascent loop on East Peak), 50k, Marathon, Half Marathon, and 6 Miles,..

The Summit 200 is a single, non-repetitive 200‑mile loop around Summit County, Colorado, centered near Frisco. The mostly non-urban route uses single-track trails, forest roads, and some rec paths and pavement, with the lowest altitude above 9,000 ft and sections climbing toward 12,800 ft, plus 12 f..