Sponsor of the Day:
Jerkmate
https://ultraswim333.com/themagic5
TheMagic5 — UltraSwim33.3
Learn about our partnership with THEMAGIC5, offering custom-fit swimming goggles for optimal performance during UltraSwim 33.3 events.
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https://ultraswim333.com/captainwebb
CaptainWebb — UltraSwim33.3
Understand the significance of the 33.3km distance in UltraSwim 33.3, inspired by the iconic English Channel swim.
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https://ultraswim333.com/results
Results — UltraSwim33.3
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https://ultraswim333.com/2026barcelona
#17BARCELONA [Costa Brava] — UltraSwim33.3
Join us for UltraSwim 33.3 in Montenegro 2027, featuring a 33.3km swim challenge amidst stunning Mediterranean landscapes.
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https://ultraswim333.com/am-i-ready
Am I ready? — UltraSwim33.3
Assess your readiness for UltraSwim 33.3 with our guidelines and tips to ensure you're prepared for the 33.3km challenge.
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https://ultraswim333.com/red
Red Equipment — UltraSwim33.3
Explore our collaboration with Outdoor Swimmer, bringing you the latest in open water swimming news and insights.
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https://ultraswim333.com/blog-1-1/introducing-the-f3-program
INTRODUCING THE F3 PROGRAM — UltraSwim33.3
Aug 7, 2025 - Introducing UltraSwim 33.3’s F3 program, for friends, family and fans!
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