When in April are most 10K races held?
The busiest weekend in Colorado is April 24 and April 25, with 5 10K races on those two days, and the single busiest day is Saturday, April 24 with 4. Every one of them is on a Saturday or a Sunday.
Race calendar · April 2027 · Colorado
April 2027 10K Races in Colorado
Every 10K in Colorado in April 2027, all 8 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
8 10K races in April 2027
What the field actually runs
April 10K Races, By the Numbers
1:07:18Median finish time
39:17Median winning time
93Median field size
4April 10K 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 Sep 22, 2026.
When in April
The April Race Weekends
10K races do not spread evenly across April. The busiest weekend is April 24 and April 25, with 5 of them.
By the numbers
The Biggest and Longest-Running
The April 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
April 10K Races by City
Soonest 10K Races in April
8 total 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 Sat, Apr 24, 2027All-Out Beat the Heat Westminster, COFrom $35Details Sat, Apr 24, 2027DoNot Stop Half Marathon/5K/10K - Colorado Springs Colorado Springs, COFrom $22Details Sat, Apr 24, 2027Coffee Lover Run DENVER/AURORA Centennial, COFrom $30Register Sat, Apr 24, 2027Run for Donut DENVER/AURORA Centennial, COFrom $30Register Sun, Apr 25, 2027DoNot Stop Half Marathon/5K/10K - Denver Denver, COFrom $22Details
Common Questions About Running an April 10K in Colorado
When should I sign up for an April 10K?
As early as you can. 2 of these April 10K races already have a price increase on the calendar, and 8 are open for entry right now.
How much does an April 10K cost to enter?
The typical entry is $30, with paid entries running from $22 up to $39. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
What is a good 10K time?
Across the 4 of these April 10K races with published results from past editions, the median finisher ran 1:07:18, and the median winning time was 39:17. So anything under 1:07:18 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 10K field?
The median one finished 93 runners, across the 4 of these April 10K 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 2:11:32.
Are there trail 10K races in Colorado in April?
Yes, one race around Colorado gets you off the pavement: 1 is a trail race. Surfaces are not always published, so it is worth checking a specific race before you register.
10K Races in Other Months
March and May sit either side of April, which is where most people look next when a date does not fit.