Saturday, July 31, 2027St. Louis, MO
Heatwave Half Marathon/5K/10K - St. Louis
4 events
- 1 Mile1 miRoadStarts 7:00 AM
- 5K5KRoadStarts 7:00 AM
- 10K10KRoadStarts 7:00 AM
- Half-MarathonHalfRoadStarts 7:00 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherHarsh weather · 25/100
- High / low
- 90° / 68°F
- 32° / 20°C
- Humidity
- 72%
- Dew point 67°F
- Chance of rain
- 43%
- Wind
- 4 mph
- Average
- Usually hot for a half marathon: about 76°F while racing.
- Muggy: dew point around 67°F.
- Rain on about 43% of days around this date.
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.1 year, 129 finishers; men and women compared separately.
- 4% slowerFinish times are typically 4% slower than at other 5Ks.1 year, 103 finishers; men and women compared separately.
- Typical timesFinish times are typical for 10Ks.1 year, 91 finishers; men and women compared separately.
| Year | Event | Finishers | Median | Men | Women |
|---|---|---|---|---|---|
| 2026 | Half-Marathon · Half | 129 | 2:12:49 | 1:59:58 | 2:21:15 |
| 2026 | Half-Marathon Relay · Half | 5 | 2:09:25 | — | — |
| 2026 | Running Buddy Half Marathon · Half | 7 | 2:20:06 | 2:08:33 | — |
| 2026 | 10 K · 10K | 91 | 59:50 | 54:36 | 1:06:28 |
| 2026 | 5 K · 5K | 103 | 36:13 | 31:07 | 41:21 |
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.
