Running Races in Denver
Denver sits at 5,280 feet of elevation, and that altitude advantage (or challenge) shapes everything about the running scene. Runners here are serious, fit, and tough. The race calendar takes full advantage of Colorado scenery with mountain views, trail races in the foothills, and fast road courses through the city. Train in Denver, race anywhere, and you will feel like you have a superpower.
Best Months
April to June, September to October
State
Colorado
Top Race
Colfax Marathon
Total Races
5+ featured
Major Races in Denver
Colfax Marathon
Marathon/HalfDenver signature marathon through City Park, Colfax Avenue, and Sloan Lake.
BolderBoulder 10K
10KOne of the largest 10Ks in the world. 50,000+ runners in nearby Boulder.
Denver Rock n Roll
Half/5KLive bands, flat course, great fall weather.
Run the Rocks
10K/5KRun through Red Rocks Amphitheatre. Steep, stunning, unforgettable.
Georgetown to Idaho Springs Half
Half MarathonDownhill mountain half in the Rockies. Fast and gorgeous.
Course Terrain
Flat in the city with foothill access 20 minutes west. Cherry Creek Trail and Platte River Trail are paved and mostly flat. Trail races nearby have serious elevation.
Race Day Tips for Denver
Altitude matters. If you are visiting, arrive 2 to 3 days early and hydrate more than you think.
Denver sun is intense at elevation. Wear sunscreen and a hat, even in spring.
Morning temperatures can be 30+ degrees cooler than afternoon. Layer up and shed as you go.
The air is very dry. Increase your fluid intake starting a few days before your race.
Running Clubs in Denver
Denver Running Club
Organized group runs across the city with pace groups for all levels.
Colorado Columbines
Competitive women running club based in Denver.
Runners Roost Racing Team
Elite and sub elite team connected to the local running store.
Turn Your Denver Runs Into a Game
Train at altitude, capture territory at 5,280 feet, and build an empire across Denver. The thin air makes every Motera run count double.
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MoteraExplore Denver Running Routes
Looking for where to train between races? Check out our full running guide for Denver with top routes, terrain info, and local tips.
Running in Denver GuideFrequently Asked Questions
Does altitude affect running in Denver?
Yes. At 5,280 feet, the air has about 17% less oxygen than at sea level. Visitors should expect to run 10 to 20% slower until acclimatized. Arrive early and hydrate heavily.
What is the BolderBoulder?
The BolderBoulder is a 10K race held on Memorial Day in Boulder, Colorado. With 50,000+ participants, it is one of the largest road races in the world. The course finishes inside Folsom Field at CU Boulder.
Are there mountain races near Denver?
Yes. Georgetown to Idaho Springs Half Marathon, Pikes Peak Ascent, Leadville 100, and dozens of trail races in the foothills and Rocky Mountains are all accessible from Denver.
What is the best race for beginners in Denver?
The Colfax Marathon weekend includes a 5K and 10K that are great for beginners. Turkey Trot races in November are also beginner friendly. Just remember the altitude if you are visiting.
When is running season in Denver?
Denver has year round running but the peak race season is April through October. Winters are cold but usually dry and sunny, so outdoor running is possible all year.
