Upcoming races with 100 miles distance in September across the USA. Use filters to quickly find races by state, city or race type.
More races:ย USA running calendar
Date Race Distance Location hf:tax:state hf:tax:city hf:tax:typerace 09/05/2025 Dark Divide Trail Races 100K, 100M, 15M, 50K Randle WA washington randle-wa trail 09/05/2025 American Heroes Run 100M, 13.1M, 24H, 26.2M, 5K, 9.11M, 9H Longmont CO colorado longmont-co roadrace 09/06/2025 Mogollon Monster 100 100M, 26.2M Pine AZ arizona pine-az trail 09/06/2025 Hawk Hundred 100M, 26.2M, 50M, 75M Lawrence KS kansas lawrence-ks trail 09/06/2025 Pine Creek Challenge 100K, 100M, 26.2M, 50M Wellsboro PA pennsylvania wellsboro-pa trail 09/12/2025 Run Rabbit Run 100M, 50M Steamboat Springs CO colorado steamboat-springs-co trail 09/13/2025 Iron Will 100 100K, 100M, 36H, 50K, 50M Junction City KS kansas junction-city-ks trail 09/13/2025 Virgil Crest Ultras 100M, 50K, 50M Cortland NY new-york cortland-ny trail 09/13/2025 Plain Endurance Runs 100K, 100M Leavenworth WA washington leavenworth-wa trail 09/13/2025 Pine to Palm 100M 100M Williams OR oregon williams-or trail 09/19/2025 The Georgia Jewel 100M, 18M, 35M, 50M Dalton GA georgia dalton-ga trail 09/20/2025 Flagstaff to Grand Canyon Stagecoach Line Ultra 100M, 55K Flagstaff AZ arizona flagstaff-az trail 09/20/2025 Mountain Lakes 100 100M Olallie Lake OR oregon olallie-lake-or trail 09/20/2025 IMTUF 100 100M, 20M McCall ID idaho mccall-id trail 09/26/2025 Cowboy 200 Ultra 100M, 200M Norfolk NE nebraska norfolk-ne trail 09/27/2025 Sangre de Cristo Ultras 100K, 100M, 27K, 50K, 50M, 8M Westcliffe CO colorado westcliffe-co trail 09/27/2025 Sangre de Cristo Trail Festival 100K, 100M, 27K, 50K, 50M, 8M Westcliffe CO colorado westcliffe-co trail
Choose your favorite distance and save the calendar for later: Half Marathons, Marathons, Ultra Marathons, 5K, 10K, 50K, 50M, 100K, 100M
September Race Calendars:
| 5K Races | 10K Races |
| Half Marathons | Marathons |
| Ultra Marathons | Trail Races |
| 50K Races | 50 Miles Races |
| 100K Races | All Races |
