Events Spooky Sprint Excelsior, MN Crossover Half Paradise, UT Bubble Run | DC Fort Washington, MD Event Series Ironman Triathlon Rock 'n' Roll Marathon Spartan Race Hot Chocolate Run Ragnar Relay
April 2025 Brad Bishop RaceDay Certification Fort Collins, CO Fri - Apr 04, 2025 Running > 5k 2025 Imperial Challenge Breckenridge, CO Apr 5, 2025 - Apr 6, 2025 Triathlon Trending Donut Dash Denver, CO Apr 6, 2025 - Jan 6, 2025 (9:00 AM) Running > 5k, Virtual Donut Dash Denver, CO Sun - Apr 06, 2025 @ 10:30 AM Running > 5k Denver Distance Classic Englewood, CO Fri - Apr 11, 2025 Running Run Through The Decades 6K/7K/8K/Half - Colorado Springs Colorado Springs, CO Sat - Apr 12, 2025 Running > 8k, Half Marathon Run Through The Decades 6K/7K/8K/Half - Colorado Springs Colorado Springs, CO Sat - Apr 12, 2025 @ 8:00 AM Running > 8k, Half Marathon, Other Running Horsetooth Half Marathon Fort Collins, CO Sun - Apr 13, 2025 @ 8:00 AM Running > Half Marathon Platte River Half-Marathon and Relay Littleton, CO Sun - Apr 13, 2025 Running > Half Marathon Dash for Detection: Oral Cancer Awareness 5K Denver, CO Sun - Apr 13, 2025 Running > 5k Little Wolverine Invitational Bayfield, CO Fri - Apr 18, 2025 Running Earth Day: Run GREEN 5K/10K/13.1 DENVER/AURORA Centennial, CO Sat - Apr 19, 2025 Running > 1 mile, 10k, 5k, Half Marathon Great Western Trail Race - 5k, 10k, Half Marathon - Severance, CO (April 19, 2025) Severance, CO Sat - Apr 19, 2025 @ 7:00 AM Running > 5k Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA Aurora, CO Sat - Apr 19, 2025 Running > 5k Fake QR Fort Collins, CO Fri - Apr 25, 2025 Running > Obstacle Race Manion WOD - Broomfield Oracle Fitness Center Broomfield, CO Apr 25, 2025 - Apr 29, 2025 Running Bigfoot Half Marathon Estes Park, CO Sat - Apr 26, 2025 Running > Half Marathon, 5k Manion WOD - The Denver Sheriff's Department Denver, CO Sat - Apr 26, 2025 Running Life in Color 5K Grand Junction, CO Sat - Apr 26, 2025 Running Manion WOD - B3 Nutrition and Fitness Fort Morgan, CO Sat - Apr 26, 2025 Running Springtime Sprint 5k Golden, CO Sat - Apr 26, 2025 Running May 2025 Sloth Runners Race 5K/10K/13.1 DENVER/AURORA Centennial, CO Sat - May 03, 2025 Running > 5k, 10k, Half Marathon, 1 mile Greenland Trail Races Larkspur, CO Sat - May 03, 2025 @ 7:00 AM Running > 5k, Trail 21st Annual Bob Turner Classic 5k Run/Walk Berthoud, CO May 3, 2025 - May 4, 2025 Running > 5k Cinco De Mayo Run: Against All Odds DENVER/AURORA Aurora, CO Sat - May 03, 2025 Running > 5k Water Wells for Africa 5k Walk/Run Silt, CO Sun - May 04, 2025 Running > 5k The Colorado Marathon Fort Collins, CO Sun - May 04, 2025 Running > 5k Walk Run or Roll for Daniel Colorado Springs, CO Tue - May 06, 2025 Running Muddy Dash | Denver Erie, CO May 10, 2025 - May 11, 2025 Running > 5k Quad Rock 50/25mi Bellvue, CO May 10, 2025 - May 11, 2025 Running > Ultra 1 2 3 4 5 › » Add your event to the calendar Trending Events Spooky Sprint Crossover Half Bubble Run | DC
Run Through The Decades 6K/7K/8K/Half - Colorado Springs Colorado Springs, CO Sat - Apr 12, 2025 Running > 8k, Half Marathon
Run Through The Decades 6K/7K/8K/Half - Colorado Springs Colorado Springs, CO Sat - Apr 12, 2025 @ 8:00 AM Running > 8k, Half Marathon, Other Running
Earth Day: Run GREEN 5K/10K/13.1 DENVER/AURORA Centennial, CO Sat - Apr 19, 2025 Running > 1 mile, 10k, 5k, Half Marathon
Great Western Trail Race - 5k, 10k, Half Marathon - Severance, CO (April 19, 2025) Severance, CO Sat - Apr 19, 2025 @ 7:00 AM Running > 5k
Sloth Runners Race 5K/10K/13.1 DENVER/AURORA Centennial, CO Sat - May 03, 2025 Running > 5k, 10k, Half Marathon, 1 mile