100mi october ultra marathons
47 races
Hell Creek 100
Oct 3-4, 2025 (Fri-Sat)
Sylvan Grove, Kansas, United States
1.9 - 3.4
$243.92 - $335.51
Iron Horse Ultra
Oct 3-4, 2025 (Fri-Sat)
St-Paul, Alberta, Canada
2 - 2.6
The Hennepin Hundred
Oct 4, 2025 (Sat)
Sterling, Illinois, United States
1.1 - 2.3
$168.57 - $594.57
El Diablo Hundo
Oct 4, 2025 (Sat)
Doyline, Louisiana, United States
$148.2 - $235.03
Crown Stub 100
Oct 4, 2025 (Sat)
Buxton, Oregon, United States
2.6
$269.75
Oil Creek 100 Trail Runs
Oct 4, 2025 (Sat)
Titusville, Pennsylvania, United States
1.3 - 2.5
Saddles 100
Oct 4, 2025 (Sat)
Prescott, Arizona, United States
1.8 - 2.7
Export 100 Trail Run
Oct 4, 2025 (Sat)
Export, Pennsylvania, United States
2.6
$156.32
Arkansas Traveller
Oct 4, 2025 (Sat)
Camp Ouachita, Arkansas, United States
2.4
Heartland
Oct 10, 2025 (Fri)
Cassoday, Kansas, United States
1.7 - 2.4
$207.66 - $343.76
BUFF EPIC Ultimate Trails of Penang
Oct 10-12, 2025 (Fri-Sun)
George Town, Penang, Malaysia
1.8 - 2.8
Kodiak Ultra Marathons
Oct 10-11, 2025 (Fri-Sat)
Big Bear Lake, California, United States
1.3 - 2.6
Mile Madness Endurance Run
Oct 10-11, 2025 (Fri-Sat)
Rocklin, California, United States
$107.68 - $428.43
Ultra Trail Amanecer Comechingón
Oct 10-11, 2025 (Fri-Sat)
Villa Yacanto, Córdoba, Argentina
Tesla Hertz Run
Oct 10, 2025 (Fri)
Rocky Point, New York, United States
1.2 - 3.1
$147.27 - $413.52
The Biggest Little Ultra
Oct 10, 2025 (Fri)
Sparks, Nevada, United States
$125.97 - $280.4
Midstate Massive Ultra Trail
Oct 11, 2025 (Sat)
New Ipswich, New Hampshire, United States
1.8 - 2.6
$243.12 - $365.6
Virginia Trail Running Festival
Oct 11, 2025 (Sat)
Fries, Virginia, United States
$88.5 - $196.18
Indiana Trail 100
Oct 11, 2025 (Sat)
Albion, Indiana, United States
1.7 - 2.4
Big Rock Morenic Trail
Oct 11, 2025 (Sat)
Andrate, Piedmont, Italy
Canal Corridor 100 Mile Endurance Run
Oct 11, 2025 (Sat)
Akron, Ohio, United States
2.3
$296.37
Hainesport Endurance Run
Oct 11-12, 2025 (Sat-Sun)
Hainesport, New Jersey, United States
2.5
Hume and Hovell Ultra
Oct 11, 2025 (Sat)
Tumbarumba, New South Wales, Australia
Farmdale Trail Run
Oct 11, 2025 (Sat)
East Peoria, Illinois, United States
1.8 - 2.6
$163.25 - $275.07
Wolverine State 100
Oct 11-12, 2025 (Sat-Sun)
Petoskey, Michigan, United States
0.9 - 2.5
$130 - $310
Showing 1 - 25 of 47 events