Colorado · Race calendar
Upcoming running races in and near Denver, Colorado - 5Ks, 10Ks, half marathons and more, with dates, pricing, finish-time stats, start-line maps, and local run clubs to train with.
38 upcoming races · 31 with finish-time stats
Denver running is built around water. The Cherry Creek and South Platte trails give you miles of flat, paved greenway right out of the urban core, while Washington Park, Sloan's Lake and Cheesman Park hand you iconic loops that locals rotate through like old friends. The city's grid and its green corridors make it easy to string together a long run without ever hunting for a route.
When you want more bite underfoot, Red Rocks and the foothill parks are close enough to make a hard workout out of stairs and dirt trails before coming back to the city. Denver runners tend not to put the shoes away in winter - lit parks and recreation centers keep the mileage going all year, which gives the local race calendar a healthy spread across every season.
By the numbers
The Denver races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Within 100 miles
More race calendars close to Denver. Miles are measured center to center, so treat them as a rough guide.
Train for it
The easiest way to a start line is a standing group run. These Denver clubs welcome runners of all paces.
Browse all Denver run clubs →How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Oct 17, 2026.
Across the 22 RunSignup 5K editions in Denver with published results on RunSesh - walkers and charity entrants included - the median finisher crossed in 37:07 and the median last finisher in 1:13:58. That spread tells you these are genuinely mixed fields. You are very unlikely to be alone at the back, and the range suggests nobody is going home early.
Fall is by far the busiest stretch, with 18 races between September and November, and September alone has 7. Summer runs second with 8 races. Winter and spring are the quietest, with 4 races each, and March is the slowest single month with just 1 race. If your training peaks in late summer, you'll have plenty to choose from come fall.
Denver has a strong club scene to plug into. Rocky Mountain Road Runners, Colorado Harriers, Revolution Running, Denver Trail Runners, Runner's Edge of the Rockies, Colorado Columbines Women's Running Club, Runners Roost Central Park Run Club and Denver Run Club all operate in the city. Whether you're building road mileage along Cherry Creek or hunting foothill trail loops, there's a group that fits.
The 5K is the dominant distance, with 28 of the 34 races offering one, and the finish-time spread across Denver 5Ks is wide - the median winner finishes in 17:41 while the median last finisher takes 1:13:58, meaning these fields include everyone from competitive runners to first-timers and walkers. You won't feel out of place starting out.
