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Slide a Traversée du lac St-Jean a Trans Tahoe a a Capri-Napoli Travessia Lisboa – Cascais a a ULTRAMARATHON SWIM SERIES The world's coldest, hardest, longest, toughest, most extreme swims by, for and about ultramarathon and extreme swimmers Trans Tahoe Traversée internationale du lac St-Jean
Maratona del Golfo Capri-Napoli
Travessia Lisboa – Cascais a a a a a a
March 16, 2020

Traditionally done as a relay, WOWSA has partnered with the Olympic Club t

Lake Tahoe, USA

March 16, 2020

Each summer since 1955, the Traversée Internationale du lac St-Jean attra

Lac St-Jean, Canada

June 15, 2020

The Travessia Lisboa Cascais 20km Open water swimming race is a point-to-p

Lisboa – Cascais, Portugal

July 15, 2023

Maratona del Golfo Capri-Napoli is one of the longest running professional

Capri-Napoli, Italy

Dedicated to the preservation of the world's most revered marathon races in a global swim series.

Slide a Ultramarathon Swim Series

Ultramarathon Swim Series

Dedicated to the preservation of the world’s most revered marathon races in a global swim series.

925.219.2107
info@ultramarathonswimseries.com
50 Water Street, San Francisco, CA 94704
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