DateExpected
Early October 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Supraśl, Poland
Supraśl, powiat białostocki
Countdown
October
A 100 km trail ultra that starts in the small hours and keeps the climbing gentle, so it's all about pacing and staying fed rather than grinding up hills.
Key facts
0116-hour cut-off for the full 106 km
02Six aid stations on the loop
03Drop bag available at Poczopek (about 59 km)
Create a free training plan for the Bison Ultra-Trail 100
7-day free trial, no card required
The course
The route
Supraśl
Distance106km
Total climb1,182m
StartElevation
0 kmDrag map to rotate101.4 km
Weather
Early-October, Supraśl
16°CTypical high
6°CTypical low
-4°CColdest in 20 years
28%Days with rain
Highs around 16°C and lows around 6°C, but it has dropped to -4°C. Rain on 28% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01GONCZAR Szymon07:47:1513.6 km/h
02GRZESZKOWIAK Wojtek08:37:0312.3 km/h
03TYBUREK Michal09:05:4011.7 km/h
342
Finishers
14:07:38
Median time
7.5 km/h
Median speed
Overall · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserFundacja Białystok Biega
Websitebisonultratrail.pl
Instagram@bisonultratrail
Running since2020
Training
Training for the Bison Ultra-Trail 100
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Bison Ultra-Trail 100 plan targets
Typical sessions
106 km with 1,182 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Bison Ultra-Trail 100 plan.
7-day free trial, no card required.
More events in October in Poland
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