Sunday, June 6, 2027Castro Valley, CA
2027 Lake Chabot Trail Challenge (Half Marathon & 5K)
2 events
- Half MarathonHalfTrailStarts 8:00 AM
- 5K Run5KTrailStarts 8:30 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherIdeal weather · 89/100
- High / low
- 77° / 50°F
- 25° / 10°C
- Humidity
- 68%
- Dew point 49°F
- Chance of rain
- 3%
- Wind
- 9 mph
- Average
- Usually warm for a half marathon: about 60°F while racing.
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 trail 5Ks.4 years, 829 finishers; men and women compared separately.
- 8% fasterFinish times are typically 8% faster than at other trail half marathons.3 years, 412 finishers; men and women compared separately.
| Year | Event | Finishers | Median | Men | Women |
|---|---|---|---|---|---|
| 2026 | Half Marathon · Half | 155 | 2:24:53 | 2:16:37 | 2:36:11 |
| 2026 | 5K Run · 5K | 230 | 36:09 | 32:58 | 39:38 |
| 2025 | 5K Run · 5K | 223 | 40:13 | 35:10 | 41:57 |
| 2024 | Half Marathon · Half | 138 | 2:20:44 | 2:17:22 | 2:35:36 |
| 2024 | 5K Run · 5K | 206 | 37:10 | 34:01 | 40:12 |
| 2023 | Half Marathon · Half | 119 | 2:16:22 | 2:11:17 | 2:25:04 |
| 2023 | 5K Run · 5K | 170 | 40:36 | 34:12 | 42:12 |
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.