Sandviken, Sweden · Saturday, October 3, 2026

Fixed Distance 50 mi

Björnfrossa Ultramaraton

3 days to go

65 km Distance

not publishedn/a Climbing

3.3 est Grit · Challenging

Calculated from 65 km alone — the organiser has not published an elevation profile. Read 3.3 as a floor, not a verdict.

60.6167° N, 16.7667° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 12 hours 11:05 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50 mi. Measured against 471 races of the same distance. Cut-off calculator →

Field size ~97 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (65km) — 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 8°C

Night low 3°C

Rainfall Mostly dry

Daylight 11 h 22 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 79 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	65km	97	Anton Staland · 05:31:07	Susanna Sjögren · 06:07:44
2024	65km	94	Axel Svärdhagen · 05:36:14	Linda Lindberg · 06:38:11
2023	65km	64	Fredrik Nilzen · 06:15:35	Stina Nordström · 07:04:46
2022	63km	71	Axel Svärdhagen · 05:32:08	Maria Nätterlund · 06:59:22
2021	63km	77	Axel Svärdhagen · 05:09:10	Malin Barrulf · 05:55:47
2020	63km	66	Stefan Ehrin · 05:14:07	Johanna Gelfgren · 05:32:21
2019	63km	55	Stefan Ehrin · 05:48:25	Zara Lundgren · 06:17:10
2018	62km	50	Joacim Lantz · 04:55:45	Anna Carlsson · 06:14:07

The field has held steady: 94 in 2024, 97 in 2025. 32% of the 2025 field were women.

DUV results for the 2025 edition (65km) — 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 65 km of trail.

Trail Running Shoes 65 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 65 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 65 km, without the bounce.
Headlamps A 12 h limit puts you out there after dark.
GPS Watches Battery life first — a 65 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

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Spring Energy