Illinois Ultramarathons
27 upcoming ultras across Illinois, updated nightly. Want radius search and maps? Open these in the Race Finder.
When to race: ultras in Illinois
Illinois has 27 upcoming ultras over the next 12 months. Among complete calendar months, March 2027 has the most listed races, with 5. Most are around Crystal Lake, Pekin, Willow Springs. The next one is Fancy Nonsense 25k/50k on October 24 in Willow Springs.
- Oct 20261 race
- Nov 20263 races
- Dec 20263 races
- Jan 20272 races
- Feb 20271 race
- Mar 20275 races
- Apr 20274 races
- May 20272 races
- Jun 20272 races
- Jul 20271 race
- Aug 20272 races
- Sep 20271 race
October 2026
- Sat 10/24Fancy Nonsense 25k/50kWillow Springs, IL · 50K · 25K · 5 Miles · register ↗
November 2026
- Sat 11/14McNotagain Fall Trail RunsPekin, IL · 50 Mile · 30 Miles · 10 Mile · 3.5 Miles · Trail · register ↗
- Sat 11/14The Forge Trail Run FestivalLemont, IL · 10K · Half Marathon · 30K · 37.2 Miles · Trail · from $45 · register ↗
- Sat 11/14Tunnel Hill 100Vienna, IL · 100 Mile · 100K · 50 Mile · Marathon · register ↗
December 2026
- Sat 12/5Da Deer Run RunHudson, IL · 8K · 4K · 3 Hour · from $15 · register ↗
- Sun 12/13Lokalz 50 KMPeoria, IL · 50K · register ↗
- Sat 12/19Tour de TrailsRockford, IL · 5K · 6 Miles · 9 Miles · 12 Miles · 30 Miles · Trail · from $25 · register ↗
January 2027
- Sat 1/950K MASHUP SLAMCrystal Lake, IL · Ultra · 50K · register ↗
- Sat 1/9Frozen GnomeCrystal Lake, IL · 50K · 10K · register ↗
February 2027
- Sat 2/20Kennekuk Road Runners - Members Only Fat AssDanville, IL · 28.4 Miles · registration closed · register ↗
March 2027
- Sat 3/20American BottomsColumbia, IL · 113 Miles · 56 Miles · register ↗
- Sat 3/27Clinton Lake UltraDeWitt, IL · 30 Miles · 10 Mile · register ↗
- Sat 3/27Schon Park 3/6/9 Endurance RunsGlen Carbon, IL · 3 Hour · 6 Hour · 9 Hour · from $60 · register ↗
- Sat 3/27SkunkApe 806/524/314 Trail RaceDixon, IL · 806 Hour · 524 Hour · 314 Hour · Trail · register ↗
- Sat 3/27The PiasaGrafton, IL · 50K · 25K · 12.5K · from $95 · register ↗
April 2027
- Thu 4/8Potawatomi Trail RunsPekin, IL · 200 Miles · Trail · register ↗
- Sat 4/17Earth Day 50k/15 Mile/5 MileCrystal Lake, IL · 50K · 15 Miles · 5 Miles · register ↗
- Sat 4/17Loud Thunder 50Illinois City, IL · 50 Mile · 50K · Half Marathon · register ↗
- Sat 4/24Childish NonsensePalatine, IL · 50 Mile · 50K · 25K · 5.5 Miles · register ↗
May 2027
- Sat 5/15Galena Sky Trail RacesGalena, IL · 8 Hour · 4 Hour · Trail · register ↗
- Sat 5/15White Squirrel RoubaixOlney, IL · 100K · 50K · 20K · from $30 · registration closed · register ↗
June 2027
- Sat 6/5Elsa Chicken Plucker Backyard UltraCharleston, IL · Timed · register ↗
- Sat 6/5Red Cedar Trail Races at Giant City State ParkMakanda, IL · 5K · 13.6 Miles · Marathon · 50 Mile · Trail · from $15 · registration closed · register ↗
July 2027
- Fri 7/9CMAR Trail Races: Cry Me A RiverChillicothe, IL · 100 Mile · 50 Mile · 50K · Half Marathon · 4 Miles · Trail · register ↗
August 2027
- Sat 8/7Highlander Assault Obstacle RacePingree Grove, IL · 50K · 15K · 5K · 3K · from $45 · register ↗
- Sat 8/21Shawnee Hills Trail RacesOzark, IL · 100 Mile · 100K · 50K · Half Marathon · Trail · register ↗
September 2027
- Fri 9/3The Ultimate SUCKCuba, IL · 50 Mile · 25 Miles · 10 Mile · from $109 · register ↗
Planning a race
- The adventure listrim to rim, the big rounds, and routes worth planning a year around
- Getting inhow entry works for the races that sell out or ballot
More Illinois: Marathons · Half Marathons · 5K Races · 10K Races · All Illinois races · Browse by state