Snow Mountain Ranch Trail Run

Snow Mountain Ranch Trail Run is put on by Endurance Race Series in Granby, Colorado, on September 12, 2026. Five trail distances are offered on the same day: a 50K (31 miles), a 33K (20.5 miles), a half marathon (13.1 miles), a 10K (6.2 miles) and a 5K (3.1 miles), all around Snow Mountain Ranch.

Granby sits above 8,000 feet, so altitude is the first thing to plan for at any distance. The 5K and 10K work well for families and for runners visiting the mountains who want a taste of high-country trail, the half and 33K reward a 12-week build with weekly hill work, and the 50K is a legitimate first ultra for trail runners with some climbing experience. Arrive early if you can, start conservatively, and let effort rather than pace guide the day.