When in June are most 10K races held?
The busiest weekend in Colorado is June 19 and June 20, with 5 of them, 3 of those on Saturday, June 19. Every one of them is on a Saturday or a Sunday.
Race calendar · June 2027 · Colorado
10K Races in Colorado in June 2027
Every 10K in Colorado in June 2027, all 8 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
June 10K Races, By the Numbers
1:02:45Median finish time
41:04Median winning time
78Median field size
7June 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 Nov 12, 2026.
When in June
The June Race Weekends
10K races are not spread evenly across June. 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 June 10K in Colorado, from the most recent published results.
Colorado 10K Races by City in June
All 10K Runs in Colorado in June
8 total Sun, Jun 6, 2027Colorado 13er (Half Marathon/10k/5k) Louisville, COFrom $44Details Sun, Jun 6, 2027Steamboat Marathon Steamboat Springs, COFrom $65Details Sat, Jun 12, 2027All-Out Summer Breeze Arvada, COFrom $45Details Sat, Jun 19, 2027Red, White and Brew 5k, 10k & Half Marathon Windsor, COFrom $50Details Sat, Jun 19, 2027Treat Trot - Denver Denver, COFrom $32Details Sat, Jun 19, 2027Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $42Register Sun, Jun 20, 2027Father's Day Classic 10k, 5k, & 1 Mile Arvada, COFrom $44Details Sun, Jun 20, 2027Treat Trot Colorado Springs Colorado Springs, COFrom $30Details
Common Questions About Running a June 10K in Colorado
What is a good 10K time?
Across the 7 of these June 10K races with published results from past editions, the median finisher ran 1:02:45, and the median winning time was 41:04. So anything under 1:02:45 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 June 10K field?
The median one finished 78 runners, across the 7 of these June 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 1:58:08.
Are there trail 10K races in Colorado in June?
Yes, one race around Colorado gets you off the pavement: 1 mixes road and trail.