Barr Lake 15K

2026

The Barr Lake 15K takes place in mid-June at Barr Lake State Park near Brighton, Colorado, covering 9.1 miles of flat, fast dirt trail. This single loop course gains just 190 feet over the entire distance, making it one of the flattest trail races you'll find in Colorado. The route circles Barr Lake with continuous water views and mountain vistas toward the Front Range. Runners pass through two aid stations — Lark's Lounge at mile 3 and O'Brian's Oasis at mile 6.3 — before finishing back at the Nature Center. The course runs entirely on dirt paths and stays at a consistent elevation around 5,100 feet, with minimal shade around the exposed lake perimeter. This race suits runners looking for a PR opportunity or those new to trail running who want a forgiving introduction. The generous 7-hour time limit and straightforward terrain make it accessible, though the June timing means warm weather and limited shade can become factors. Runners who prefer technical terrain or significant climbing might find the course monotonous, but those focused on speed will appreciate the fast, runnable surface.