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The 5.5km Thames Marathon is a challenging and scenic open-water swim that takes participants on a spectacular journey along the River Thames from Henley-on-Thames to Marlow.
Known for its picturesque route and point-to-point format, this long-distance swim offers a rewarding test of stamina and skill through some of the most beautiful stretches of the Thames.
Swimmers navigate tranquil, meandering waters flanked by lush countryside, charming riverside towns, and historic landmarks. With excellent event organization and a supportive atmosphere, the Thames Marathon is perfect for experienced swimmers seeking a memorable endurance challenge. Whether aiming for a fast time or simply soaking in the views, the 5.5km Thames Marathon delivers an unforgettable open-water experience.
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Billed £149.99 a year after your free trial
12 months for less than the price of 8
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19.99
Billed monthly after your free trial
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The 5km Swim at Belvoir Castle is a premier open-water event set within the picturesque grounds of the historic Belvoir Castle in Leicestershire. Scheduled for Saturday 18th July 2026, as part of the Belvoir Castle Multisport Festival, this race offers participants the opportunity to swim a 5km course in the serene West Lake, all while enjoying the stunning backdrop of the castle.
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The 2 Mile Henley Swim is a challenging open water event set in the River Thames at Temple Island Meadows during the Henley Swim Festival. Swimmers can compete in either the Suits category, wearing wetsuits for added buoyancy and warmth, or the Skins category, following traditional open water swimming rules without a wetsuit. This scenic and rewarding swim is ideal for experienced swimmers looking to test their endurance in the iconic Henley course.
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