The 13km Thames Marathon is a true test of grit and endurance, offering swimmers the rare chance to conquer one of the longest and most beautiful stretches of the River Thames.
Spanning from Henley-on-Thames to Marlow, this epic point-to-point challenge takes participants through 13km of winding river, past rolling countryside, quaint villages, and historic bridges.
It’s not just the distance that makes this swim special—it’s the journey. The peaceful flow of the river contrasts with the relentless effort required to push through mile after mile. Surrounded by nature and history, swimmers find themselves immersed in the landscape as much as the water itself. With meticulous organization, top-notch safety support, and a camaraderie among participants that fuels determination, the 13km Thames Marathon delivers a spectacular, unforgettable experience for those bold enough to take it on.
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The Dart10k is a challenging yet stunning open water swim, taking participants on a 10-kilometer journey along the River Dart in Devon. Starting in the historic town of Totnes, swimmers follow the river to the Greenway Estate, completing the swim surrounded by breathtaking natural beauty. Although the swim covers a long distance, the current in the River Dart is often a helpful force, working with you as you swim downstream, making it easier than swimming a standard 10k.
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The 10K Great North Swim is a tough endurance challenge for swimmers aged 18 and over, covering 10,000m—equivalent to 400 lengths of a standard 25m pool. Entrants must be able to swim the full 10K unaided within 4 hours. The average completion time is around 2 to 3 hours. Full support is provided with lifeguards, kayakers, and safety boats throughout the swim, ensuring safety in the stunning Lake Windermere. This race is designed for experienced swimmers seeking to take on a serious open water endurance challenge.
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Test your endurance and take on the ultimate challenge with the Super 6 mile swim in London's Hyde Park! Swim Serpentine offers this incredible race on Saturday, September 20th. Imagine yourself swimming six miles in the iconic lake, pushing your limits and achieving a truly remarkable feat of endurance.
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The Chillswim Ullswater 7.5 Miles End to End is a premier open water swimming event set in the picturesque Lake District. Scheduled for Saturday, July 12, 2025, this swim offers participants the opportunity to traverse the full length of Ullswater, starting at Glenridding in the south and finishing at Parkfoot Holiday Park near Pooley Bridge in the north. The route is approximately 7.5 miles (12 kilometers) long, with swimmers keeping within approximately 50 meters of the shore after the first mile.
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