Zeus Grand Prix

🏊‍♂️ Zeus Grand Prix Open Water 2026

The Zeus Grand Prix is a national and international open water swimming event taking place on June 10, 2026, at the stunning Praia Fluvial do Alqueidão on the banks of the Zêzere River in Tomar, Portugal. Organized by Sociedade Filarmónica Gualdim Pais (SFGP), it offers races for swimmers of all ages and levels, providing a unique natural water experience.

Shorter distances are held in a circuit at Praia Fluvial do Alqueidão, while the 25 km ultramarathon connects Dornes (Ferreira do Zêzere) to Tomar, offering a challenging and spectacular course. Safety is ensured with support boats and ambulance, with strict rules to protect athletes.

🏔️ Races

• 25 km Ultramarathon (Dornes to Tomar) – Start 07:30 · 3h30 cutoff at 10 km · Minimum age 18 · Kayak accompaniment mandatory
• 3,000 m – Start 11:30 · Circuit at Praia Fluvial do Alqueidão · Minimum age 14
• 1,500 m – Start 11:50 · Circuit at Praia Fluvial do Alqueidão · Minimum age 12
• 1,500 m with wetsuit – Start 11:45 · Circuit at Praia Fluvial do Alqueidão · Minimum age 12
• 500 m Kids – Start 11:00 · Circuit at Praia Fluvial do Alqueidão · Minimum age 9

⏰ Schedule

• 06:40 – Secretariat opens at Dornes (25 km)
• 07:15 – Secretariat closes Dornes
• 07:20 – Briefing and race presentation
• 07:30 – 25 km Ultramarathon start
• 09:00 – Secretariat opens at Praia Fluvial do Alqueidão
• 10:30 – Secretariat closes Praia Fluvial
• 10:45 – Briefing for remaining races
• 11:00 – 500 m start
• 11:30 – 3,000 m start
• 11:45 – 1,500 m wetsuit start
• 11:50 – 1,500 m start
• 14:30 – Awards ceremony

🎽 Registration includes Bib, timing chip, sports insurance, event kit with t-shirt and gifts, refreshments and support during races.

🏆 Prizes Medals for top 3 by gender and age groups in 1,500 m and 3,000 m races. Finisher medals for all 500 m participants. Prize money for top 3 absolute and gender classifications in the 25 km ultramarathon.

🏅 Circuit One-off event organized by Sociedade Filarmónica Gualdim Pais with support from Tomar and Ferreira do Zêzere municipalities.

🏊‍♂️ Join Zeus Grand Prix and challenge yourself in the clear waters of the Zêzere River! 🌊