Björnfrossa Ultramarathon takes place on Sat, Oct 3, 2026 in Sandviken, Sweden. The main route is 65 km.
- Date
- Sat, Oct 3, 2026
- Start
- Sandviken 🇸🇪
- Distance
- 65 km
- Climbing
- 1,200 m
- Level
- Open to all
Björnfrossa ultramaraton is a 65 km trail running race through the bear country and forests of Gästrikland, featuring technical paths and gravel roads with about 1200 metres of elevation gain.
Official event pageWhat this race demands
Björnfrossa Ultramarathon requires sustaining forward motion across a 65 km distance on technical forest paths and gravel roads while managing 1200 metres of elevation gain.
Distance and Durability
Covering 65 km on foot demands extensive musculoskeletal resilience to handle repetitive impact over many hours.
Technical Footwork
Navigating the technical paths of Gästrikland requires sustained concentration, agility, and economy on uneven terrain.
Climbing Capacity
Accumulating 1200 metres of elevation gain across the route necessitates efficient pacing on ascents and descents.
Given the extended duration, athletes should consume 60 to 90 grams of carbohydrates per hour to maintain energy balance.
Estimated finish times
Estimates by level, not promises. Your own number depends on your fitness on the day.
Your road to race day
Race day at Björnfrossa Ultramarathon is 6 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak3 weeks · Aug 23, 2026 – Sep 12, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Sep 13, 2026 – Sep 26, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 27, 2026 – Oct 3, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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