Rodeo Beach, Sausalito, CA, United States · Saturday, March 13, 2027

Fixed Distance 50 mi

Marin Ultra Challenge 50 Mile Race

146 days away

80 km Distance

3,300 m Climbing

9.0 Grit · Elite / extreme

What the course asks

Climbing rate 41 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Field size ~175 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2026 edition (50mi) — 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	50mi	175	Reed Breuer · 07:18:00	Leandra Zimmermann · 08:05:02
2025	50mi	140	Jonah Backstrom · 07:29:24	Kimberly Neely · 08:03:00
2024	50mi	133	Kevin Stewart · 07:05:31	Natalie Chirgwin · 08:45:01
2023	50mi	112	Can-Hua Luo · 07:19:53	Pauline Loulier · 08:40:06
2022	50mi	149	Leo Pershall · 08:15:16	Samantha Bear · 08:39:36
2019	50mi	180	Vincent Dimassa · 06:57:05	Megan Arauzo Kono · 07:52:23
2018	50mi	166	Lon Freeman · 07:08:19	Megan Arauzo Kono · 08:36:40
2017	50mi	136	Christopher Mocko · 06:47:48	Celia Stockwell · 08:59:45
2016	50mi	125	Ryan Neely · 06:39:38	Nicole Kalogeropoulos Studer · 08:16:57
2015	50mi	99	Paul Terranova · 07:48:56	Suzanna Bon · 09:06:39

The field grew 25% between 2025 (140) and 2026 (175). 30% of the 2026 field were women.

DUV results for the 2026 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

terrain This is a mountain course. Poles are highly recommended for the sustained climbs.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 80 km of trail with 3,300 m of ascent.

Trail Running Shoes 41 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 80 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 3,300 m of ascent to walk up.
Headlamps 80 km almost certainly means running into the night.

La Sportiva

Prodigio Pro

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Asics