Biserov plavalni maraton takes place on Sun, Sep 6, 2026 in Portorož, Slovenia. The main route is 5 km.
- Date
- Sun, Sep 6, 2026
- Start
- Portorož 🇸🇮
- Distance
- 5 km
- Level
- Open to all
Biserov plavalni maraton is an open water swimming event held in Portorož, Slovenia, featuring a 5 km Slovenian Open Water Championship race alongside shorter distances.
Official event pageWhat this race demands
This 5 km open water swimming event demands sustained aerobic endurance and continuous stroke efficiency over an extended duration.
Aerobic endurance
The 5 km distance requires maintaining a steady metabolic output for hours without stopping.
Open water navigation
Racing in the sea in Portorož requires constant sighting and adaptability to open water conditions.
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Organising this race?