Sunday, April 11, 2027Littleton, CO
Platte River Half-Marathon, Relay & 5k
2 events
- Half MarathonHalfRoadStarts 7:00 AM
- 5k5KRoadStarts 7:15 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherIdeal weather · 88/100
- High / low
- 58° / 29°F
- 15° / -1°C
- Humidity
- 48%
- Dew point 22°F
- Chance of rain
- 25%
- Wind
- 10 mph
- Average
- Usually ideal weather for a half marathon.
Averages for this area and time of year over the last 20 years, from NASA POWER data. Not a forecast.
Past results
- Typical timesFinish times are typical for half marathons.4 years, 1,219 finishers; men and women compared separately.
- 13% fasterFinish times are typically 13% faster than at other 5Ks.1 year, 137 finishers; men and women compared separately.
| Year | Event | Finishers | Median | Men | Women |
|---|---|---|---|---|---|
| 2026 | Half Marathon · Half | 635 | 2:07:06 | 1:58:39 | 2:14:03 |
| 2026 | Half Marathon Relay · Half | 48 | 2:11:39 | 2:02:37 | 2:21:37 |
| 2026 | 5k · 5K | 137 | 30:47 | 30:48 | 30:47 |
| 2025 | Half Marathon · Half | 503 | 2:04:03 | 1:57:55 | 2:11:44 |
| 2025 | Half Marathon Relay · Half | 33 | 2:10:23 | 2:04:28 | 2:10:25 |
Median finish times from results published on RunSignup. Keyrace keeps only these summaries, never individual results. A fast or slow field affects times as much as the course does.