24H Bydgoszcz Open Water Swimming takes place on Sat, Sep 12, 2026 in Bydgoszcz, Poland.
- Date
- Sat, Sep 12, 2026
- Start
- Bydgoszcz 🇵🇱
- Level
- Open to all
24H Bydgoszcz Open Water Swimming is a unique 24-hour river swimming marathon held annually on the Brda River in the city center of Bydgoszcz, inspired by the 24h Le Mans motor race.
Official event pageWhat this race demands
This 24-hour river swimming marathon demands continuous physical exertion, extreme mental endurance, and the ability to manage prolonged cold-water exposure and fatigue over a full day.
Continuous Duration
Because the event lasts 24 hours, athletes must sustain forward momentum and manage sleep deprivation while pacing themselves across a full diurnal cycle.
Open Water Durability
Swimming in the Brda River requires sighting, stamina, and resilience against changing water conditions and continuous muscular stress without extended rest periods.
Nutritional Execution
Maintaining output over a 24-hour period requires strict adherence to an in-water fueling and hydration protocol to prevent energy depletion.
A continuous intake of 60 to 90 grams of carbohydrates per hour is required to sustain energy output across the 24-hour duration.
Your road to race day
Race day at 24H Bydgoszcz Open Water Swimming is 3 weeks away. This is how a coach divides that time. The first phase starts now.
01Taper2 weeks · Aug 23, 2026 – Sep 5, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
02Race week1 week · Sep 6, 2026 – Sep 12, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Similar races
Organising this race?