Trail Running calendar near Denver 2025-2026

We have found 63 Trailruns within 80 miles of Denver. See below where and when you can find the races.

The Timberview Trail Run is an annual trail running event held at Lory State Park in Bellvue, Colorado. Celebrating its seventh year in 2026, the race offers three distances: 5K, 5 mile, and 10 mile, catering to all levels from beginners to experienced trail runners. The scenic course features trail..

July 2026

The Silverheels Trail Runs, hosted by the Human Potential Running Series, take place at the Como Roundhouse in Como, Colorado, at an average elevation above 10,000 feet. This scenic event offers multiple race distances including 10-Mile, 19-Mile, 60k, 50-Mile, 100k, and 100-Mile options. The course..

The Summit 200 is a challenging 200-mile ultramarathon held in Frisco, Colorado, featuring a single loop through Summit County's stunning mountain terrain. The course includes scenic hiking trails, forest roads, and some pavement, with elevations ranging from 9,000 to nearly 13,000 feet and a total..