GBR - Manai Strait Swim 20km 2026

NEW DATE for the Ultimate Menai Strait swim! The last one sold out super fast so do t miss out!

Take on the Castle to Castle Swim Challenge – a 20km open-water adventure between Beaumaris Castle and Caernarfon Castle down the legendary Menai Strait. Swim through fast moving tides, breathtaking scenery, past historic bridges and wildlife, fully supported by our safety team and expert guides. This unique endurance event offers challenge, camaraderie, and an unforgettable journey along one of Wales’ most iconic waterways. Register now!

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