Outdoor events near Boulder, Colorado
31 outdoor events are on within 25 miles of Boulder over the next three months: 30 races. 2 are this weekend. A typical October day in Boulder reaches about 66°F and drops to 37°F, with rain or snow about 1 day in 4 (NOAA 30-year average).
- 31 upcoming
- 2 this weekend
- October: 13
- November: 13
- December: 4
- January: 1
- RaceBoulder XC Series Meet 1Sat, Oct 10 · 9:00 AMBoulder · 1.0 mi from Boulder
- 5KWesty Half & 5kSun, Oct 11 · 8:00 AMWestminster · 13 mi from Boulder
Nearby · joiseyshowaa from Freehold, NJ, USA, CC BY-SA 2.0 (via Wikimedia Commons)RaceCYCLO-X LouisvilleSat, Oct 17 · All dayLouisville · 6.0 mi from Boulder
Nearby · Jeffrey Beall, CC BY 3.0 (via Wikimedia Commons)5KLiving Water 5K and Family Fun Walk/JogSat, Oct 17 · 8:00 AMDenver · 20 mi from Boulder- 5KLongmonster Dash 5kSat, Oct 17 · 8:30 AMLongmont · 12 mi from Boulder
- 10 mileThe Great Trailhead Foot Race 5 & 10 MilerSat, Oct 17 · 9:00 AMLakewood · 24 mi from Boulder
- RaceThe KEG EnduroSun, Oct 18 · 9:00 AMIdaho Springs · 24 mi from Boulder
- 5KApex Foundation Trick or Trot 5K & Halloween Hunt Powered by REP FitnessSat, Oct 24 · 4:00 AMArvada · 15 mi from Boulder
- RaceRace to Cure Sarcoma DenverSat, Oct 24 · 8:30 AMBerkeley Lake Park, Denver · 21 mi from Boulder
- 5K · 10KGhosts and Goblins 5K/10KSun, Oct 25 · 9:00 AMCity Park, Denver · 24 mi from Boulder
- RaceCYCLO-X BoulderSat, Oct 31 · All dayBoulder · 3.9 mi from Boulder
- 5KI Ain't Scared (of 5k)Sat, Oct 31 · 9:15 AMThornton · 19 mi from Boulder
- 5K · 1 mileZombie Fun Run 5k & 1mileSat, Oct 31 · 10:00 AMIdaho Springs · 25 mi from Boulder
- ultraThe Unselfish UltraSat, Nov 7 · 7:00 AMGolden · 21 mi from Boulder
- 5K12th edition Sole Mates 5k & Brew Fest presented by Shoes & Brews and Left Hand BrewingSat, Nov 7 · 9:30 AMLongmont · 12 mi from Boulder
- 5K · 1KExcel Eagle Trot 5K/1K Family Fun RunSat, Nov 7 · 9:30 AMArvada · 14 mi from Boulder
- RaceBoulder CupSat, Nov 14 · All dayBoulder · 1.2 mi from Boulder
Nearby · jjes84, CC BY 2.0 (via Flickr)RaceDenver Veterans Day RunSat, Nov 14 · 8:30 AMDenver City Park, Denver · 24 mi from Boulder- 5KLeyden Rock Turkey Trot 5KSat, Nov 14 · 9:00 AMArvada · 12 mi from Boulder
- 5KGirls on the Run Denver Metro 5KSun, Nov 15 · 8:00 AMDenver · 23 mi from Boulder
- half marathon · 10K · 5K · 2KTURKEY TREK (13.1, 10k, 5k & 2k)Sat, Nov 21 · 8:30 AMArvada · 12 mi from Boulder
- 5K · 10KPumpkin Pie 5K/10KSat, Nov 21 · 9:00 AMCity Park, Denver · 24 mi from Boulder
- 5K · 10KBroomfield Turkey Day 5K/10KThu, Nov 26 · 8:30 AMBroomfield · 12 mi from Boulder
- 5KAlpine Bank Boulder Thanksgiving Day 5KThu, Nov 26 · 9:00 AMBoulder · 1.5 mi from Boulder
- RaceThe Pilgrimage Run 2026Thu, Nov 26 · 9:00 AMErie · 9.9 mi from Boulder
- Nearby · joiseyshowaa from Freehold, NJ, USA, CC BY-SA 2.0 (via Wikimedia Commons)RaceAdventHealth Avista Louisville Turkey TrotThu, Nov 26 · 9:00 AMLouisville · 7.1 mi from Boulder
- RaceCYCLO-X LongmontSat, Dec 5 · All dayLongmont · 15 mi from Boulder
Nearby · Dave Dugdale, CC BY-SA 2.0 (via Flickr)RaceSuperior Stocking RunSat, Dec 12 · 10:00 AMSuperior · 7.0 mi from Boulder
Nearby · joiseyshowaa from Freehold, NJ, USA, CC BY-SA 2.0 (via Wikimedia Commons)5KWinterFest 5k & Fun RunSat, Dec 12 · 10:10 AMThornton · 18 mi from Boulder- RaceSanta's Dash for Ca$hSat, Dec 19 · 10:00 AMDenver · 22 mi from Boulder
Nearby · ToGa Wanderings, CC BY 2.0 (via Flickr)5KResolute Runner 5kFri, Jan 1 · 10:00 AMArvada · 18 mi from Boulder
Photos marked “Nearby” show a place close to the event, not the event itself.
More in Colorado
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.
