⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (July 11, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
About
Grin & Bear It takes place in Crested Butte on July 10, 2027, with a 25K trail race (15.5 miles) at 8 a.m., a 15K trail race (9.3 miles) at 9 a.m. and a 14.9-mile (23.9 km) mountain bike race at 11 a.m.
This long-running endurance event is set in the Crested Butte area, in the heart of Colorado's mountain country. Running and cycling are now both on the program, with the bike course following part of the running route. The focus is on climbing routes, for anyone who wants to explore the great outdoors while testing their limits.
Prepare for Grin & Bear It with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Crested Butte.
Crested Butte Ultra
Sep 25, 2027 · Crested Butte, CO · 0 mi away
21.7 mi · 34.2 mi · 50 mi
Grand Traverse Trail Run
Sep 4, 2027 · Crested Butte, CO · 0 mi away
40 mi
Volcanic 50
Aug 7, 2027 · Marble Mountain Sno-Park, WA · 17 mi away
32 mi · 15.5 mi
Sage Burner Trail Races
Oct 2, 2027 · Gunnison, CO · 22 mi away
9.3 mi · 17.4 mi · 31.1 mi
Snowmass Tree-O | 2k + 5k + 10k + 17k Challenge | Snowmass, CO
Aug 6, 2027 · Snowmass Village, CO · 24 mi away
10.6 mi · 6.2 mi · 3.1 mi · 1.2 mi
Audi Power of Four Trail Run
Jul 17, 2027 · Aspen, CO · 24 mi away
6.2 mi · 15 mi · 31 mi