Grindstone Trail Running Festival by UTMB
About
Embark on an unforgettable adventure at the Grindstone Running Festival by UTMB, where the courses traverse the breathtaking landscapes of national forests west of the Shenandoah Valley. Runners are treated to iconic views of fall foliage and majestic mountain vistas while navigating through challenging and demanding terrains. Participate in the endurance-testing 100-mile or 100K races, pushing your limits and earning your place in the UTMB® World Series Finals. This festival promises a unique and rewarding challenge for those looking to get gritty and soak in the stunning natural beauty.
Races
50K
Sep 19, 2026 (Sat)
Distance
50 km
Terrain
Trail
Elevation gain
5,020 ft
Elevation loss
5,020 ft
Difficulty
Beginner
Cutoff time
9h
Course record (M)
3:57:10
Course record (F)
4:25:36
100K
Sep 18, 2026 (Fri)
Distance
100 km
Elevation gain
3,350 m
Difficulty
Intermediate
100K
Sep 19, 2026 (Sat)
Distance
100 km
Terrain
Trail
Elevation gain
11,020 ft
Elevation loss
11,020 ft
Difficulty
Intermediate
Cutoff time
18h
Course record (M)
8:54:43
Course record (F)
10:37:25
100mi
Sep 18, 2026 (Fri)
Distance
100 mi
Terrain
Trail
Course
Out & back
Elevation gain
21,053 ft
Elevation loss
21,053 ft
Difficulty
Hard
Cutoff time
36h
Course record (M)
17:13:04
Course record (F)
21:54:09
Weather history
Temperature
56°F / 75°F
Feels like
55°F / 76°F
Avg sunshine hours
9h 12m
Avg rainfall
0.15 in
Avg snowfall
-
Max wind speed
7.8 mph (Gentle breeze)
Sweat loss rate
Moderate
Trail conditions
Firm and dry, very runnable
