Fastest 10Ks in Colorado
The Colorado 10Ks where finishers run fastest, ranked by median finish time over each race's last three years of results.
- 156:38median finish
- 257:13median finish
- 357:18median finish
- 457:43median finish
- 558:02median finish
- 6Parker Parks and Recreation So Long to Summer 5K/10KParker210 finishers over 3 yearsLast run Sep 26, 2026 55°F race morning59:33median finish
- 71:00:00median finish
- 81:00:42median finish
- 91:01:28median finish
- 101:01:34median finish
- 111:02:01median finish
- 121:02:26median finish
- 131:02:35median finish
- 141:02:47median finish
- 151:03:06median finish
- 161:03:08median finish
- 171:03:20median finish
- 181:03:37median finish
- 19HRCA Wildcat Mountain Trail RacesLittleton327 finishers over 3 yearsLast run Oct 3, 2026 51°F race morning1:03:55median finish
- 201:04:13median finish
- 211:04:30median finish
- 221:04:55median finish
- 231:05:10median finish
- 24Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile RunWindsor464 finishers over 3 yearsLast run Oct 4, 20261:05:19median finish
- 251:05:25median finish
The top 25 of 40 ranked 10Ks in Colorado.
Fastest 10Ks by state
Common questions
What is the fastest 10K in Colorado?
By the results we track, Longmont Turkey Trot in Longmont: its median finisher runs 56:38, 9:07 per mile, over its last 3 years. Next is Father's Day Classic 10k, 5k, & 1 Mile at 57:13.
How are the races ranked?
By the median finish time of each race's last three years of results: the time half its finishers beat. A race needs at least 200 finishers to be ranked. It reflects the course, the usual weather and who enters: races that draw serious runners rank high.
Which 10K is best for a personal record?
Look for a flat course, a cool race morning and a field near your pace, so you have people to run with. The races here are where finishers run fastest; check each one's course and weather, shown in its listing.