Westwood-Susanville, CA, United States · Sunday, October 11, 2026

Fixed Distance 50K

Bizz Johnson 50 km Trail Run

11 days to go

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.

34.0561° N, 118.4306° 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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it.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 ~29 Small. Long stretches with nobody in sight.

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, October

Daytime high 25°C

Night low 14°C

Rainfall Dry — rain unlikely

Daylight 11 h 32 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 395 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	29	Darren Partyka · 04:05:20	Mallory Tevini · 05:40:18
2024	50km	30	Brendan Holmes · 04:00:35	Marybeth Davis · 05:17:47
2023	50km	46	Travis Lavin · 03:23:21	Cara Sullivan · 04:44:35
2022	50km	26	Adam Kimble · 03:43:21	Amy Thomsen · 05:42:49
2019	50km	37	Carr Rieger · 04:04:50	Margie Mathewson · 04:39:14
2018	50km	31	Vince Alexandrescu · 04:04:10	Lisa Hughey · 04:06:16
2017	50km	26	Robert Ressl-Moyer · 03:33:57	Mindy Merrill · 05:08:06
2016	50km	21	Brian Purcell · 03:44:24	Ashley Backman · 04:33:21
2015	50km	34	Kevin Moore · 03:39:00	Lisa Balestrini · 04:25:41
2014	50km	52	Ronald Hess · 03:41:14	Nicole Vaillant · 04:38:37

The field has held steady: 30 in 2024, 29 in 2025. 45% 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.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

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

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Nathan

VaporKrar 12L

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

$170 ★★★★★ 4.6

Garmin

Enduro 3

Ultra-endurance GPS watch with solar charging and 300+ hour battery in GPS mode.

$900 ★★★★★ 4.8

All gear guides →

Overview

The Bizz Johnson 50 km Trail Run, organized by Coastal Trail Runs, takes place in Westwood-Susanville, CA, in October. With 10 editions run since 2014, the race has a history of competition on the Bizz Johnson Trail through Lassen National Forest.

Runners face an 8-hour time limit for the 50 km distance, which implies a cutoff pace of 9.6 minutes per kilometer. This makes the cutoff tighter than 80% of 1022 comparable 50k races, leaving less margin for error than most. The race's field size is smaller than 42% of 2662 comparable 50k races, with 29 finishers in its latest 2025 edition.

Similar races

Other 50K trail ultras, closest in distance first.