Is August a good month for a 10K?
It is one of the thinnest months of the year for the 10K. August carries 140, against 507 in November. Expect to book earlier and travel further, and start from the states below rather than from a date.
Race calendar · August 2027
10K Races in August 2027
140 10K races across the US in August 2027, sorted by date. Which weekends are busiest, what the fields actually run, entry fees, and where each one starts.
August heat is the defining factor for a 10K this month. Much of the country is at peak summer humidity, which shortens the window for comfortable racing and pushes many events toward very early morning starts. The South and Midwest are the most demanding, while the mountain West and northern states offer more forgiving mornings.
For runners willing to work with the conditions, August 6.2-milers tend to be smaller, more local events with a different feel than the crowded spring and fall race season. Coastal cities and higher-elevation towns are worth seeking out if you have flexibility. If you are heat-trained and realistic about effort, this month rewards runners who do not need perfect conditions to toe a line.
What the field actually runs
August 10K Races, By the Numbers
1:06:40Median finish time
43:49Median winning time
42Median field size
92August 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 August
The August Race Weekends
10K races are not spread evenly across August. 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 August 10K, from the most recent published results.
August 10K Races by State
Florida 23Texas 18California 10Missouri 8Oklahoma 7North Carolina 6Pennsylvania 6Washington 6Kentucky 5Arkansas 4Colorado 4Michigan 4Minnesota 3Nebraska 3Ohio 3Tennessee 3Utah 3Wisconsin 3Arizona 2Georgia 2Illinois 2Iowa 2Maryland 2Virginia 2Idaho 1Indiana 1Kansas 1New Jersey 1New York 1Oregon 1South Carolina 1South Dakota 1Vermont 1
10K Runs by City in August
The Next 10K Runs in August
140 total Sun, Aug 1, 2027Little Miami Half Marathon and 10K Morrow, OHFrom $45Details Sun, Aug 1, 2027Two Face 10K Wexford, PAFrom $65Details Sun, Aug 1, 2027Run LA 10 Miler Los Angeles, CAFrom $35Details Sun, Aug 1, 2027Heatwave Half Marathon/5K/10K - Kansas City Parkville, MOFrom $31Details Sun, Aug 1, 2027Heatwave Half Marathon5K/10K - Houston Houston, TXFrom $33Details Sun, Aug 1, 2027Heatwave Half Marathon/5K/10K - Greater Chicago Elk Grove Village, ILFrom $38Details Sun, Aug 1, 2027Shark Week Showdown 5K, 10K - San Antonio, TX San Antonio, TXFrom $35Details Sun, Aug 1, 2027Shark Week Showdown 5K & 10K - Houston, TX Houston, TXFrom $35Details Sat, Aug 7, 2027High Mountain Half Marathon 2027 Lakeside, AZFrom $45Details Sat, Aug 7, 2027Run2Overcome 5k & 10k Greenville, SCFrom $20Details Sat, Aug 7, 2027Summer Sizzler- Louisville Louisville, KYFrom $34Details Sat, Aug 7, 2027Summer Sizzler- Denver Denver, COFrom $32Details
Common Questions About Running an August 10K
Is August too hot to race a 10K?
For most of the country, August heat and humidity make a 10K genuinely harder to race at goal pace. Plan for effort-based running rather than chasing a personal best. Colorado, Minnesota, and the Pacific Northwest tend to offer cooler mornings than Texas or Florida, where humidity can make even a 6.2-mile effort feel punishing before the sun is fully up.
What should I wear and carry for an August 10K?
Light, moisture-wicking fabric and a hat or visor are the essentials. Sunscreen matters even at early starts. A handheld water bottle is worth considering if the course has limited aid stations. At 6.2 miles, you are unlikely to bonk, but dehydration over a hot finish stretch is a real risk, especially in the South.
How far ahead should I start training to be ready for an August 10K?
A full summer training block lands you in peak fitness right as the calendar thins out. If you are building from a solid base, eight weeks of structured 10K work is enough. The harder question is whether your long runs and tempo efforts have been done in heat, because racing in August without heat-adapted training is where most pacing plans fall apart.
Are there cooler-weather options for an August 10K in the US?
Yes. Colorado has a cluster of races at elevation, where mornings stay cooler than at sea level. Minnesota and the Pacific Northwest also tend to offer more manageable conditions. If you are willing to travel, those regions give you a realistic shot at running close to your regular pace rather than managing a heat adjustment.
Should I book travel for an August 10K or wait for fall?
If you have a specific goal time in mind, waiting for fall is likely the smarter choice given how much heat affects 10K performance. But if you want to stay race-fit through summer, an August 10K in a mountain town or northern city makes a good fitness marker. Just treat it as a hard effort, not a benchmark.
When in August are most 10K races held?
The busiest weekend is August 14 and August 15, with 40 of them, 30 of those on Saturday, August 14. Every one of them is on a Saturday or a Sunday.
What is a good 10K time?
Across the 92 of these August 10K races with published results from past editions, the median finisher ran 1:06:40, and the median winning time was 43:49. So anything under 1:06:40 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 August 10K field?
The median one finished 42 runners, across the 92 of these August 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 1:40:28.
Which states have the most August 10K races?
Florida has 23, Texas has 18, California has 10, Missouri has 8, Oklahoma has 7. If you are willing to travel, those are the states where an August weekend gives you the most to choose from.
Are there trail 10K races in August?
Yes, 4 races around the United States get you off the pavement: 2 are trail races, and 2 mix road and trail.