Saturday, July 31, 2027Caledonia, MI
Heatwave Half Marathon/5K/10K - Grand Rapids
4 events
- 1 Mile1 miRoadStarts 8:00 AM
- 5K5KRoadStarts 8:00 AM
- 10K10KRoadStarts 8:00 AM
- Half-MarathonHalfRoadStarts 8:00 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherHarsh weather · 39/100
- High / low
- 87° / 66°F
- 31° / 19°C
- Humidity
- 72%
- Dew point 65°F
- Chance of rain
- 39%
- Wind
- 4 mph
- Average
- Usually warm for a half marathon: about 73°F while racing.
- Muggy: dew point around 65°F.
- Rain on about 39% 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 5Ks.1 year, 55 finishers; men and women compared separately.
- Typical timesFinish times are typical for half marathons.1 year, 52 finishers; men and women compared separately.
- Typical timesFinish times are typical for 10Ks.1 year, 34 finishers; men and women compared separately.
| Year | Event | Finishers | Median | Men | Women |
|---|---|---|---|---|---|
| 2026 | Half-Marathon · Half | 52 | 2:06:34 | 1:57:06 | 2:26:40 |
| 2026 | Running Buddy Half Marathon · Half | 3 | 2:10:33 | — | — |
| 2026 | 10 K · 10K | 34 | 1:01:30 | 1:00:31 | 1:02:06 |
| 2026 | 5 K · 5K | 55 | 35:49 | 31:34 | 36:43 |
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.