When in April are most 5K races held?
The busiest weekend in Colorado is April 24 and April 25, with 8 of them, 5 of those on Saturday, April 24. Every one of them is on a Saturday or a Sunday.
Race calendar · April 2027 · Colorado
5K Races in Colorado in April 2027
Every 5K in Colorado in April 2027, all 14 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
April 5K Races, By the Numbers
35:44Median finish time
18:25Median winning time
164Median field size
9April 5K races with published results
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 Nov 12, 2026.
When in April
The April Race Weekends
5K races are not spread evenly across April. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
By the numbers
The Biggest Field
The largest field of any April 5K in Colorado, from the most recent published results.
Colorado 5K Races by City in April
All 5K Runs in Colorado in April
14 total Sun, Apr 4, 2027Donut Dash Denver, COFrom $30Details Sat, Apr 10, 2027Sloth Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sat, Apr 10, 2027Run for PB&J 5k/10k/13.1 DENVER/AURORA Centennial, COFrom $30Register Sun, Apr 11, 2027Spring Fling Prairie Dog Half, 10k, & 5k Arvada, COFrom $39Details Sun, Apr 11, 2027Platte River Half-Marathon, Relay & 5k Littleton, COFrom $50Details Sun, Apr 11, 2027Hop Into Spring 5K - Denver Denver, COFrom $30Details Sat, Apr 24, 2027All-Out Beat the Heat Westminster, COFrom $40Details Sat, Apr 24, 2027DoNot Stop Half Marathon/5K/10K - Colorado Springs Colorado Springs, COFrom $30Details Sat, Apr 24, 2027Bigfoot Half Marathon Estes Park, COFrom $45Details Sat, Apr 24, 2027Coffee Lovers Run DENVER/AURORA Centennial, COFrom $30Register Sat, Apr 24, 2027Run for Donuts DENVER/AURORA Centennial, COFrom $30Register Sun, Apr 25, 2027Pueblo Spring Runoff Pueblo, COFrom $35Details Sun, Apr 25, 2027Unicorn 5k (Denver-East) Denver, COFrom $44Details Sun, Apr 25, 2027DoNot Stop Half Marathon/5K/10K - Denver Denver, COFrom $32Details
Common Questions About Running an April 5K in Colorado
What is a good 5K time?
Across the 9 of these April 5K races with published results from past editions, the median finisher ran 35:44, and the median winning time was 18:25. So anything under 35:44 puts you in the faster half of a typical field. That is the middle of these RunSignup fields, walkers and charity entrants included, not a national average.
How big is a typical April 5K field?
The median one finished 164 runners, across the 9 of these April 5K races with published results from past editions. Most are far smaller than the big-city events people picture, which means less crowding at the start and a friendlier field, with a last recorded finisher at 1:17:19.
Are there trail 5K races in Colorado in April?
Yes, one race around Colorado gets you off the pavement: 1 is a trail race.