Ultra Running Hub Suprasl, Poland · Saturday, October 3, 2026
Fixed Distance 100K
Bison Ultra-Trail 100
17 days to go
104 km Distance
1,159 m Climbing
6.9 Grit · Hardcore
What the course asks
Climbing rate 11 m / km
Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.
Time limit 16 hours
9:14 min/km average. Comfortable. Room to walk the climbs and stop at aid. About average for a 100K. Measured against 208 races of the same distance. Cut-off calculator →
Field size ~267 Large. Rarely out of sight of another runner.
DUV results for the 2025 edition (104km) — 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 11°C
Night low 3°C
Rainfall Mostly dry
Daylight 11 h 32 m of light
Regional 2001-2020 average for October — NASA POWER, grid elevation 142 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a fast & flat course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.
Gear for this race
Chosen for 104 km of trail with 1,159 m of ascent.
- Trail Running Shoes104 km of trail — cushioning that is still there in the last quarter.
- Race NutritionPast 104 km the palate quits before the legs do — carry more than one flavour.
- Hydration VestsFlask capacity for 104 km, without the bounce.
- HeadlampsA 16 h limit puts you out there after dark.
- AccessoriesChafe and blisters end more 104 km races than fitness does.
Similar races
Other 100K trail ultras, closest in distance first.