Wielonek Triathlon Challenge takes place on Sun, Sep 20, 2026 in Wielonek, Poland. The main route is 51.6 km.
- Date
- Sun, Sep 20, 2026
- Start
- Wielonek 🇵🇱
- Distance
- 51.6 km
- Level
- Open to all
Wielonek Triathlon Challenge features a swim in the Koronowo Reservoir and a run course conducted entirely through the forests of the Tuchola Forest district.
Official event pageWhat this race demands
Wielonek Triathlon Challenge is a 51.6 km multisport event combining an open-water swim in the Koronowo Reservoir with a forest run through the Tuchola Forest district.
Multidisciplinary transition
Athletes must manage physical fatigue across consecutive swim, bike, and run disciplines over a 51.6 km total distance.
Open-water swim focus
The swim leg in the Koronowo Reservoir demands efficient sighting and pacing without the aid of walls or lane lines.
Unpaved running terrain
The run course conducted entirely through the Tuchola Forest district requires stability and endurance on natural trail surfaces.
A 51.6 km triathlon typically takes most athletes between 2 and 4 hours to complete, requiring a consistent intake of 45 to 60 grams of carbohydrates per hour to maintain output.
Your road to race day
Race day at Wielonek Triathlon Challenge is 4 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak1 week · Aug 24, 2026 – Aug 30, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Aug 31, 2026 – Sep 13, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 14, 2026 – Sep 20, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Similar races
Organising this race?