All races
Swim

24H Bydgoszcz Open Water Swimming

24H Bydgoszcz Open Water Swimming took place on Sat, Sep 12, 2026 in Bydgoszcz, Poland.

This race has already taken place. See upcoming races

Date
Sat, Sep 12, 2026
Start
Bydgoszcz 🇵🇱
Level
Open to all

Got a race in mind?

Use IntervalCoach to train for your next event, an AI coach that builds your plan and adapts it every day.

Start free

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.

What 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.

Frequently asked questions

When is 24H Bydgoszcz Open Water Swimming?

24H Bydgoszcz Open Water Swimming took place on Sat, Sep 12, 2026 in Bydgoszcz, Poland.

What does 24H Bydgoszcz Open Water Swimming demand?

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.

Who is 24H Bydgoszcz Open Water Swimming for?

24H Bydgoszcz Open Water Swimming is open to all participants.

Similar races

Organising this race?