Berkeley, CA, United States · Saturday, September 12, 2026

Fixed Distance 50K

Berkeley Trail Adventure

Race completed

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.

37.8716° N, 122.2728° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 8 hours 9:36 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 89% of 50K races. Measured against 1034 races of the same distance. Cut-off calculator →

Field size ~75 Mid-sized. Company early, well spread out by halfway.

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, September

Daytime high 23°C

Night low 12°C

Rainfall Dry — rain unlikely

Daylight 12 h 36 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 87 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	75	Rob Nachtwey · 04:22:09	Kn Unknown · 04:45:45
2024	50km	52	Kevin Stewart · 04:02:58	Anna Bretan · 05:03:44
2023	50km	62	Jason Pohl · 04:53:38	Alina Edwards · 05:16:53
2022	50km	45	Hugo Robas · 04:37:42	Lily Kitagawa · 05:57:02
2021	50km	64	Daniel Kono · 04:52:19	Katherine Song · 05:24:07
2019	50km	47	Damon Valenzona · 04:09:47	Anna Bretan · 04:53:03
2018	50km	64	Christopher Denucci · 04:09:25	Aryn Yancher · 05:52:46
2017	50km	56	Remi Delille · 04:35:13	Anna Bretan · 05:01:12
2016	50km	38	Shane Young · 04:01:35	Devon Yanko · 04:44:37
2015	50km	54	Tristan Roberts · 04:34:15	Stephanie Wuerth · 05:42:48

The field grew 44% between 2024 (52) and 2025 (75). 28% 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

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

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.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Overview

The Berkeley Trail Adventure is a 50k trail race organised by Inside Trail Racing, with its 12th edition scheduled for September 2026 in Berkeley, CA. It has taken place every year since 2015, with 75 finishers in its 2025 edition.

This 50k race has a cut-off tighter than 80% of its 1022 peer races, requiring runners to maintain a pace faster than 9.6 minutes per kilometre to finish within the 8-hour limit. With a field size larger than 71% of 2663 comparable 50k races, it draws more participants than most events of its type.

Similar races

Other 50K trail ultras, closest in distance first.