Bison Ultra-Trail takes place on Sat, Oct 3, 2026 in Supraśl, Poland. The main route is 106 km.
- Date
- Sat, Oct 3, 2026
- Start
- Supraśl 🇵🇱
- Distance
- 106 km
- Climbing
- 1,257 m
- Level
- Open to all
Bison Ultra-Trail is a trail running event held in Supraśl, Poland, featuring multiple distances winding through the forested paths and rolling terrain of the Knyszyńska Primeval Forest.
Official event pageWhat this race demands
The Bison Ultra-Trail 106 km course demands sustained cardiovascular endurance and muscular durability over a very long duration on forested rolling terrain.
Aerobic Endurance
Covering 106 kilometers requires maintaining an efficient low-to-moderate aerobic output for many consecutive hours.
Muscular Durability
Repeated impacts and rolling terrain over an ultra-distance demand high resistance to eccentric muscle fatigue in the lower limbs.
Tactical Pacing
The lengthy distance necessitates disciplined energy and pace management from the start to prevent early metabolic depletion.
Given the extended duration well beyond 2.5 hours, athletes should target an intake of 60 to 90 grams of carbohydrates per hour to maintain performance.
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 Bison Ultra-Trail 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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