Ultra Running Hub Castro Valley, CA, United States · Saturday, November 7, 2026
Lake Chabot 50 km Trail Run
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, November
Regional 2001-2020 average for November — NASA POWER, grid elevation 233 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 38 | James Scanlan · 04:09:34 | Rebecca Heymann · 04:26:09 |
| 2024 | 50km | 37 | Dylan Merrell · 04:52:46 | Catherine Shallow · 04:32:34 |
| 2023 | 50km | 28 | James Scanlan · 04:08:41 | Jessie Brewer · 06:01:31 |
| 2022 | 50km | 35 | Jean Pommier · 04:06:53 | Katherine Song · 04:11:30 |
| 2021 | 50km | 38 | Brandon Piechowski · 04:01:19 | Katharine Johanssen · 05:00:27 |
| 2019 | 50km | 48 | Kermit Cuff · 04:27:54 | Beverley Anderson-Abbs · 04:17:24 |
| 2018 | 50km | 28 | Jordan Reyes · 04:31:47 | Angie Withey · 06:03:14 |
| 2017 | 50km | 36 | Bob Shebest · 03:47:35 | Dagmar Platzer · 06:13:43 |
| 2016 | 50km | 38 | Matt Fitzgerald · 04:04:51 | Amy Thomsen · 06:01:42 |
| 2015 | 50km | 26 | Michael Cusick · 04:13:57 | Sablle Scheppmann · 05:20:27 |
The field has held steady: 37 in 2024, 38 in 2025. 37% of the 2025 field were women.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail.
- Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Overview
The Lake Chabot 50 km Trail Run, organized by Coastal Trail Runs, takes place in Castro Valley, CA, in November. This 50 km trail race has a time limit of 8 hours.
With a cut-off tighter than 80% of 50k races, this event offers less leeway for a slow pace compared to 1019 peer races. The 9.6 minutes per kilometer cut-off pace means runners must maintain a steady effort.
The course starts at the Marina and explores the Lake Chabot Reservoir and its surrounding hills. With 10 editions run since 2015, the race has a history of attracting a field larger than 50% of 2660 comparable 50k events.
Similar races
Other 50K trail ultras, closest in distance first.