When in June are most 10K races held?
The busiest weekend in Colorado is June 19 and June 20, with 5 10K races on those two days, and the single busiest day is Saturday, June 19 with 3. Every one of them is on a Saturday or a Sunday.
Race calendar · June 2027 · Colorado
June 2027 10K Races in Colorado
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.
8 10K races in June 2027
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 Sep 22, 2026.
When in June
The June Race Weekends
10K races do not spread evenly across June. The busiest weekend is June 19 and June 20, with 5 of them.
By the numbers
The Biggest and Longest-Running
The June 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
June 10K Races by City
Soonest 10K Races in June
8 total Sun, Jun 6, 2027Colorado 13er (Half Marathon/10k/5k) Louisville, COFrom $35Details Sun, Jun 6, 2027The Steamboat Marathon Steamboat Springs, COFrom $65Details Sat, Jun 12, 2027All-Out Summer Breeze Arvada, COFrom $35Details Sat, Jun 19, 2027Red, White and Brew 5k, 10k & Half Marathon Windsor, COFrom $18Details Sat, Jun 19, 2027Treat Trot - Denver Denver, COFrom $22Details Sat, Jun 19, 2027Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sun, Jun 20, 2027Father's Day Classic 10k, 5k, & 1 Mile Arvada, COFrom $12Details Sun, Jun 20, 2027Treat Trot Colorado Springs Colorado Springs, COFrom $22Details
Common Questions About Running a June 10K in Colorado
When should I sign up for a June 10K?
As early as you can. 5 of these June 10K races already have a price increase on the calendar, and 8 are open for entry right now.
How much does a June 10K cost to enter?
The typical entry is $30, with paid entries running from $12 up to $65. 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 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. Surfaces are not always published, so it is worth checking a specific race before you register.
10K Races in Other Months
May and July sit either side of June, which is where most people look next when a date does not fit.