Outdoor events near O'Fallon, Missouri
30 outdoor events are on within 25 miles of O'Fallon over the next three months: 30 races. 5 are this weekend. A typical October day in O'Fallon reaches about 68°F and drops to 46°F, with rain or snow about 1 day in 4 (NOAA 30-year average).
- 30 upcoming
- 5 this weekend
- October: 15
- November: 10
- December: 3
- January: 2
- RaceDeClue Loop Trail RaceSat, Oct 10 · 7:00 AMGreensfelder County Park, Wildwood · 20 mi from O'Fallon
- ultraBackyard Ultra in New Town (Oct 10 8:00AM)Sat, Oct 10 · 8:00 AMSaint Charles · 13 mi from O'Fallon
- RaceWebster Groves Elementary / Middle School Cross Country RacesSat, Oct 10 · 12:15 PMBlackburn Park, Webster Groves · 24 mi from O'Fallon
- 5KPurple Leash 5K & Fun RunSun, Oct 11 · 9:00 AMGray Summit · 20 mi from O'Fallon
- 6KSTL CURE SARCOMA 6K RUN/WALKSun, Oct 11 · 9:30 AMMaryland Heights · 15 mi from O'Fallon
- 5KUMSL 5K Run/Walk hosted by the UMSL Alumni AssociationSat, Oct 17 · All daySaint Louis · 23 mi from O'Fallon
- RaceMinnie Ha Ha 6 & 12 Hour Endurance RunsSat, Oct 17 · 7:00 AM24 mi from O'Fallon
- 5KDream Run 5KSat, Oct 17 · 8:00 AMTroy Dream Center, Troy · 20 mi from O'Fallon
- RaceTHE WHEELIE BIG RACESat, Oct 17 · 9:00 AMValley Park · 21 mi from O'Fallon
- 5KClayton Community 5K Run WalkSun, Oct 18 · 8:30 AMEnterprise Holdings Pavilion, Clayton · 23 mi from O'Fallon
- 5KRunner's Boo Bash 5k and Fun Run/WalkSun, Oct 18 · 9:00 AMSaint Ann · 19 mi from O'Fallon
- 5KMoonlight Howl 5K Run/WalkFri, Oct 23 · 9:00 PMBallwin · 15 mi from O'Fallon
- half marathon · 10KThe Innsbrook Half Marathon & 10kSat, Oct 24 · 9:00 AMCharrette Creek Commons, Innsbrook · 17 mi from O'Fallon
- RaceRun Witch RunSat, Oct 31 · 8:45 AMCottleville · 4.5 mi from O'Fallon
- RaceThe SKIPPO Trail RaceSat, Oct 31 · 9:00 AMCastlewood State Park, Ballwin · 18 mi from O'Fallon
- half marathon · marathon · 10K · 5KMO' Cowbell Marathon/Half-Marathon/10K/5KSun, Nov 8 · 7:00 AMFrontier Park, Saint Charles · 12 mi from O'Fallon
- 5KCocoa Classic 5kSun, Nov 8 · 11:00 AMSaint Louis · 24 mi from O'Fallon
- RaceWash U vs. Cancer Turkey TrotSat, Nov 14 · 10:00 AMSumers Recreation Center, Saint Louis · 23 mi from O'Fallon
- RaceOlivette Turkey TrotThu, Nov 26 · All daySaint Louis · 20 mi from O'Fallon
Nearby · pasa47, CC BY 2.0 (via Flickr)Race44th Annual Kirkwood Webster Turkey Day RunThu, Nov 26 · 7:30 AMKirkwood Farmer's Market, Kirkwood · 21 mi from O'Fallon- RaceChesterfield Turkey TrotThu, Nov 26 · 8:30 AMChesterfield · 12 mi from O'Fallon
- 5KChesterfield 38th Annual Gobble Wobble 5KThu, Nov 26 · 8:30 AMChesterfield · 14 mi from O'Fallon
- 5K · 10KWILDWOOD 5K and 10K Turkey TrotThu, Nov 26 · 8:30 AMWildwood Farmers Market, Grover · 16 mi from O'Fallon
- RaceTurkey Trails - St. LouisSat, Nov 28 · 8:00 AMMaryland Heights · 15 mi from O'Fallon
- RaceTrail Trot on Turkey RidgeSat, Nov 28 · 8:00 AMWildwood · 16 mi from O'Fallon
- 5K · 10K · 1 mileDashing through Defiance - 1 mile | 5k | 10kSat, Dec 5 · 9:00 AMDefiance · 11 mi from O'Fallon
- 5 mile · 10 mileWild in the Woods - 5 & 10 mile Trail RaceSat, Dec 5 · 9:00 AMDefiance · 6.6 mi from O'Fallon
- Race2026 Jingle Bell Run - St. Louis, MOSat, Dec 19 · 9:00 AMSaint Charles · 12 mi from O'Fallon
- RaceShITR - Shivery Icy Trail RunSun, Jan 3 · 8:00 AMSaint Louis · 13 mi from O'Fallon
- half marathon · 5K · 10KTime Travel Half-Marathon/5K/10K - St. LouisSun, Jan 3 · 9:00 AMMaryland Heights · 15 mi from O'Fallon
Photos marked “Nearby” show a place close to the event, not the event itself.
More in Missouri
Schedules come from park agencies, race sites and organizers' own calendars, checked daily. Events can change, so check the event page before you go. Typical weather is the NOAA 1991–2020 average.
