Ultra Running Hub Rodeo Beach, Sausalito, CA, United States · Saturday, March 13, 2027
Fixed Distance 50K
Marin Ultra Challenge 50 km Race
126 days away
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level
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
Field size ~224 Large. Rarely out of sight of another runner.
DUV results for the 2026 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, March
Daylight 11 h 49 m of light
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2026 | 50km | 224 | Zander Geddes · 04:03:03 | Yiou Wang · 04:30:10 |
| 2025 | 50km | 231 | Grant Hotaling · 03:48:22 | Hannah Allgood · 03:51:32 |
| 2024 | 50km | 244 | Patrick Rabuzzi · 03:51:45 | Lindsay Allison · 04:16:11 |
| 2023 | 50km | 186 | Robert Ressl-Moyer · 04:00:05 | Jennifer S. Schmidt · 04:03:44 |
| 2022 | 50km | 236 | Gabriel Kline · 03:35:47 | Brittany Peterson · 04:07:23 |
| 2019 | 50km | 240 | Alex Varner · 03:36:07 | Katie Arnold · 04:29:07 |
| 2018 | 50km | 226 | Jeff Mogavero · 03:42:51 | Jenny Comiskey · 04:36:53 |
| 2017 | 50km | 193 | Erik Sorenson · 03:55:23 | Emily Peterson · 04:14:18 |
| 2016 | 50km | 190 | Alex Ho · 04:01:37 | Emily Peterson · 04:23:30 |
| 2015 | 50km | 142 | Bob Shebest · 03:55:06 | Emily Richards · 04:15:36 |
The field has held steady: 231 in 2025, 224 in 2026. 38% of the 2026 field were women.
DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Course notes
- gear 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.
Similar races
Other 50K trail ultras, closest in distance first.