Hard 6hr ultra marathons
10 races
Notchview Ultra
Jul 11-13, 2025 (Fri-Sun)
Windsor, Massachusetts, United States
2.7
$82.18 - $237.8
101mi
6h
12h
24h
48h
72h
Tally in the Valley
Jul 26, 2025 (Sat)
Dundas, Ontario, Canada
2.6
100mi
6h
12h
24h
American Heroes Run
Sep 5-6, 2025 (Fri-Sat)
Longmont, Colorado, United States
2.7
$115.32 - $253.77
100mi
6h
9h
24h
Cahuilla Rez Ultra
Oct 18, 2025 (Sat)
Anza, California, United States
2.9
$66.25 - $131.3
100mi
6h
12h
24h
Fat Ox
Nov 21, 2025 (Fri)
Buckeye, Arizona, United States
1.6 - 2.6
$136.75 - $339.52
50K
50mi
100K
100mi
6h
12h
24h
48h
Boundiful Endurance Runs
Nov 29, 2025 (Sat)
Hemet, California, United States
2.7
$152.6 - $237.8
100mi
6h
12h
24h
DT Stone Anvil
Apr 15-18, 2026 (Wed-Sat)
Chatsworth, Georgia, United States
2.8
50K
100K
100mi
200mi
6h
12h
72h
High Lea 6/12/24 Hour
May 16, 2026 (Sat)
Richfield, Ohio, United States
2.8
$82.18 - $253.77
100mi
6h
12h
24h
The Underground Circus 100
May 23, 2026 (Sat)
Atlanta, Georgia, United States
2.1 - 2.6
$97.06 - $396.48
40mi
50mi
100mi
6h
12h
24h
48h
Nanny Goat
May 23, 2026 (Sat)
Riverside, California, United States
2.5
100mi
6h
12h
24h
Showing 1 - 10 of 10 events