The 3000m ONE on the Lake Dorney Swim is a thrilling endurance challenge set in the pristine, flat waters of Dorney Lake.

The 1500m ONE on the Lake Dorney Swim is a dynamic open-water race set in the pristine, mirror-like waters of Dorney Lake.

The 750m ONE on the Lake Dorney Swim offers a fun and accessible open-water experience set against the pristine, calm waters of Dorney Lake.

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.

The 9km Thames Marathon is a prestigious and demanding open-water swim that guides participants along a stunning stretch of the River Thames from Henley-on-Thames to Marlow.

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.

The Henley Classic is a thrilling, early-morning open-water swim set on the iconic Henley Royal Regatta course along the River Thames.

The 750m ONE on the River Henley Swim offers a delightful open-water experience in the renowned waters of the River Thames at Henley-on-Thames.

The 1500m ONE on the River Henley Swim is an exciting mid-distance challenge set against the picturesque backdrop of the River Thames at Henley-on-Thames.

The 3000m ONE on the River Henley Swim is an exhilarating open-water challenge set in the iconic stretch of the River Thames at Henley-on-Thames.

The 3000m ONE on the River Marlow Swim offers a thrilling and demanding open-water challenge set in the serene waters of the River Thames at Marlow.

The 1500m ONE on the River Marlow Swim is a captivating open-water race set in the tranquil and scenic waters of the River Thames at Marlow.

The 750m ONE on the River Marlow Swim offers a fun and accessible open-water challenge set in the serene waters of the River Thames at Marlow.

The 3000m Dawlish Swim is an exciting open-water endurance challenge set in the beautiful waters of Dawlish Warren in Devon.

The 1500m Dawlish Swim is a thrilling open-water challenge set in the scenic waters of Dawlish Warren in Devon.

The 750m Dawlish Swim offers an enjoyable and accessible open-water challenge set in the beautiful setting of Dawlish Warren in Devon.

The 3000m English Riviera Swim is a challenging and exhilarating open-water race set in the stunning waters of Torbay in Devon.

The 1500m English Riviera Swim is an exhilarating open-water challenge set in the picturesque waters of Torbay in Devon.

The 750m English Riviera Swim offers an exciting open-water race set against the stunning backdrop of Torbay in Devon.

The 1500m Plymouth Swim is an exciting open-water race set in the stunning waters of Plymouth Sound.

The 1500m Plymouth Swim is an exciting open-water race set in the stunning waters of Plymouth Sound.

The 750m Plymouth Swim offers a fantastic open-water challenge in the stunning surroundings of Plymouth Sound.

The 5km Roadford Lake Swim is a true open-water endurance challenge, set in the stunningly serene surroundings of Roadford Lake in Devon.

The 2.5km Roadford Lake Swim is a fantastic open-water endurance challenge set in the calm, scenic waters of Roadford Lake in Devon.

The 1500m Roadford Lake Swim offers a rewarding open-water challenge in the peaceful, picturesque setting of Roadford Lake in Devon.

The 750m Roadford Lake Swim is a fantastic open-water challenge set in the serene, scenic surroundings of Roadford Lake in Devon.

The 500m Roadford Lake Swim offers a gentle yet rewarding open-water experience in the peaceful surroundings of Roadford Lake, nestled in the heart of Devon.

The 750m Dartmouth Swim is a perfect entry-level open-water race set in the tranquil and picturesque waters of the River Dart in South Devon.

The 1500m Dartmouth Swim offers a fantastic open-water challenge in the beautiful surroundings of the River Dart in South Devon.

The 3km Dartmouth Swim is a stunning open-water race set in the picturesque waters of the River Dart in South Devon. Taking place in the charming coastal town of Dartmouth, this event offers swimmers a scenic and rewarding challenge along one of the most beautiful river courses in the UK.

The 5km Wild Dart Swim is an exhilarating open-water challenge set in the stunning River Dart, nestled within the beautiful Dartmoor National Park in Devon. As part of the Wild Dart Swim and Aquathlon event, this race takes swimmers through 5km of calm yet dynamic river waters, offering a unique experience surrounded by breathtaking countryside.

The 2.5km Wild Dart Swim is an exciting open-water race set in the scenic River Dart in Devon. Part of the Wild Dart Swim and Aquathlon event, this race takes swimmers on a thrilling 2.5km journey through the calm, clear waters of the river.

The 2 Mile Canary Wharf Swim offers an exhilarating open-water challenge set against the iconic skyline of London’s Canary Wharf. Swimmers will navigate the calm, controlled waters of the West India Docks, enjoying the unique experience of racing through one of the most famous financial districts in the world.

The 1 Mile Canary Wharf Swim offers a unique and exciting open-water challenge set in the heart of London’s iconic Canary Wharf. This race takes swimmers through the calm waters of the West India Docks, providing a stunning urban backdrop as they navigate the course.

The Sprint Distance Wales SwimRun offers a fast-paced and exciting multisport challenge set along the stunning Pembrokeshire coastline. This shorter version of the Full Distance event is perfect for those looking to experience the thrill of swimrun in a more accessible format.

The Full Distance Wales SwimRun is an exhilarating endurance challenge set against the breathtaking coastline of Pembrokeshire. This unique event takes athletes on a demanding yet stunning journey through a series of swim and run segments, navigating rugged trails, sandy beaches, and open water along the Welsh coast.

The 750m Swansea Swim offers a fantastic open-water experience in the stunning Swansea Bay, providing the perfect challenge for both new and experienced swimmers. As part of the Swansea Triathlon weekend, this race features a mass start and a well-marked course along the scenic Welsh coastline.

The 1.9km Swansea Swim is a thrilling open-water race set in the stunning waters of Swansea Bay. As part of the Swansea Triathlon weekend, this event offers swimmers the chance to experience the excitement of a mass-start race while navigating a well-marked course along the beautiful Welsh coastline.

The 3km Swansea Swim is an exciting open-water race set against the stunning backdrop of Swansea Bay. Part of the wider Swansea Triathlon weekend, this event offers swimmers the chance to test their endurance in the calm yet challenging waters of the bay.

The 2.4-mile Wales Swim is a thrilling open-water challenge set in the breathtaking coastal waters of Tenby, Pembrokeshire. As part of the renowned Long Course Weekend, this race offers athletes the opportunity to swim the full Iron-distance in the stunning yet demanding waters of Carmarthen Bay.

The 1.2-mile Wales Swim offers an exhilarating open-water challenge in the stunning coastal waters of Tenby, Pembrokeshire. Part of the iconic Long Course Weekend, this event sees swimmers take on a scenic yet demanding course in Carmarthen Bay, starting with a thrilling mass start from Tenby’s North Beach.

The Outlaw Full Nottingham is one of the UK’s premier long-distance triathlons, offering athletes a challenging yet rewarding race experience in a stunning setting. Held at the National Water Sports Centre, the event begins with a 2.4-mile swim in the calm regatta lake, providing a smooth and controlled start to the race.

The Outlaw Half Nottingham is a flagship middle-distance triathlon, renowned for its fast, scenic course and outstanding race-day experience. Hosted at the National Water Sports Centre, the event kicks off with a 1.2-mile swim in the calm, sheltered regatta lake, providing a smooth and controlled start.

The 1 Mile Swim at Hever Castle is a delightful open-water event set within the picturesque grounds of Hever Castle in Kent. Scheduled for September 27, 2025, as part of the Castle Race Series, this race offers participants the chance to swim a 1-mile course in the tranquil Hever Lake, surrounded by the historic beauty of the castle and its expansive gardens.

The 2.5km Swim at Hever Castle is a captivating open-water race set in the scenic surroundings of Hever Castle in Kent. Part of the Castle Race Series, this event allows swimmers to navigate a 2.5km course around the 13-acre island in the River Eden, with the historic castle and its lush gardens providing a picturesque backdrop.

The 5km Swim at Hever Castle offers a thrilling open-water challenge set in the stunning surroundings of Hever Castle in Kent. As part of the Castle Race Series, this event allows swimmers to race a 5km course in the tranquil waters of Hever Lake, with the iconic castle and its beautiful gardens serving as a picturesque backdrop.

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 July 19-20, 2025, 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.

The 2.5km Swim at Belvoir Castle is a captivating open-water race set within the picturesque grounds of the historic Belvoir Castle in Leicestershire. Scheduled for July 19-20, 2025, as part of the Belvoir Castle Multisport Festival, this event offers swimmers the opportunity to navigate a 2.5km course in the serene West Lake, all while enjoying the stunning backdrop of the castle.

The 1 Mile Swim at Belvoir Castle offers a thrilling open-water challenge set in the stunning Belvoir Estate, located in the heart of rural Leicestershire. Part of the Castle Race Series, this event allows swimmers to navigate a 1-mile course in the picturesque Rutland Water, surrounded by breathtaking views of the estate and its historic castle.

The 1 Mile Swim at Cholmondeley Castle is a captivating open-water event set within the picturesque Deer Park Mere, located in the expansive grounds of Cholmondeley Castle in Cheshire. Taking place on Saturday, June 21, 2025, as part of the Cholmondeley Castle Multisport Festival, this race offers participants the opportunity to swim a 1-mile course in a private, scenic setting.

The 2.5km Swim at Cholmondeley Castle offers a captivating open-water experience within the serene Deer Park Mere, nestled in the expansive grounds of Cholmondeley Castle in Cheshire. Scheduled for June 21, 2025, this event is part of the Cholmondeley Castle Multisport Festival, which also features a 5km swim and a 1-mile swim, catering to a variety of swimming enthusiasts.

The 5km Swim at Cholmondeley Castle is a stunning open-water race set in the heart of the picturesque Cheshire countryside. Taking place in the estate’s private lake, this event offers swimmers the chance to test their endurance in a beautiful yet challenging setting.

The ÖTILLÖ Åland Experience is the perfect introduction to the world of swimrun, offering a shorter and more approachable course set in the stunning Åland archipelago. Designed for beginners, families, and those looking to enjoy the sport in a more relaxed setting, this event allows participants to experience the thrill of transitioning between land and water without the intense demands of longer races.

The ÖTILLÖ Åland Sprint offers a thrilling yet accessible swimrun experience set against the breathtaking backdrop of the Åland archipelago. Designed for those looking to challenge themselves without the extreme distances of the World Series event, this race combines shorter running and swimming segments while maintaining the technical demands and natural beauty that define the sport.

The ÖTILLÖ Åland World Series is an exhilarating swimrun event set in the stunning Åland archipelago, offering athletes a unique and challenging course through rugged island landscapes and open water crossings. Known for its breathtaking scenery and technical difficulty, the race demands endurance, teamwork, and adaptability as participants navigate multiple transitions between running and swimming.

The Outlaw Half Holkham offers a challenging and rewarding triathlon experience set in the beautiful Holkham Estate. Participants will tackle a 1.2-mile open-water swim in the serene lake on the Holkham Estate.

Envision yourself undertaking a significant open-water feat, traversing the stunning waters of Snowdonia National Park for 2.4 miles. This isn't just a race; it's a test of your endurance and a deep immersion into one of the UK's most breathtaking landscapes.

Imagine yourself embarking on a 2000m open-water adventure, immersed in the awe-inspiring landscapes of Snowdonia National Park. This is more than just a swim; it's a journey through one of the UK's most spectacular natural settings.

Picture yourself taking on a thrilling 1000m swim amidst the dramatic scenery of Snowdonia National Park. This is more than just a race; it's an opportunity to test your open-water skills in one of the UK's most stunning locations.

Envision yourself undertaking a significant open-water challenge, navigating the expansive waters of Cardiff Bay with the city's impressive skyline as your guide. This is more than a race; it's a true test of endurance and determination. The Cardiff Bay Open Water Swim 2025 proudly presents the demanding 3800m race.

Picture yourself embarking on a more substantial swim through the waters of Cardiff Bay, the iconic cityscape providing a stunning backdrop. This isn't just a swim; it's a test of endurance and skill. The Cardiff Bay Open Water Swim 2025 features a challenging 1900m race. Whether you're a seasoned open-water swimmer seeking a new personal best or a triathlete building your endurance, this event is your chance to shine. This event is primarily for triathletes looking to warm up or gain open water experience; however, it is open to everyone.

Picture yourself slicing through the pristine waters of Cardiff Bay, the iconic cityscape reflecting off the gentle ripples. This isn't just a swim; it's an experience. The Cardiff Bay Open Water Swim 2025 offers an exhilarating 750m race. Whether you're a seasoned triathlete seeking to hone your open water skills or a passionate swimmer ready for a new adventure, this event is your chance to shine. This event is primarily for triathletes looking to warm up or gain open water experience; however, it is open to everyone.

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.

Double the challenge and experience the ultimate open-water swim in the Serpentine lake in London's Hyde Park! Swim Serpentine offers a challenging 2-mile race on Saturday, September 20th. Envision yourself swimming two full laps of the iconic lake, pushing your limits, and achieving a remarkable feat of endurance.

Take the plunge in the famous Serpentine lake in London's Hyde Park and challenge yourself to the 1-mile swim! Swim Serpentine offers a fantastic race on Saturday, September 20th. Picture yourself completing a full lap of the lake, experiencing this iconic event, and challenging yourself at your own pace.

Dive into the heart of London's Hyde Park and experience the thrill of open-water swimming in the iconic Serpentine lake! Swim Serpentine offers a fantastic half-mile race on Saturday, September 20th. Imagine yourself gliding through the clear water, surrounded by the beautiful scenery, and feeling the exhilaration of the challenge

This course explores the southwest side of St Mary’s, offering more than just a stroll—it's a stunning introduction to swimrun racing.

A complete journey around the island of St Mary’s, swimming safely in every bay and connecting them with stunning trails that showcase breathtaking scenery.

The Hurly Burly is an exhilarating 10-kilometer river swim set in the stunning Snowdonia National Park in North Wales. Starting from the sandy beach of Barmouth, swimmers journey beneath the iconic Barmouth Bridge, a mile-and-a-half-wide railway bridge, and navigate the wide, sandy estuary flanked by mountains. The course then leads through 'the narrows' into a more sheltered part of the estuary, offering a dynamic and challenging swim.

The Bantham Swoosh is a renowned 6-kilometer open water swim held annually in the Avon (Aune) estuary in Devon. The event starts in the picturesque village of Aveton Gifford and concludes at the stunning Bantham Beach. Swimmers experience the unique thrill of the "swoosh," where the ebbing tide funnels through a narrow section of the river, propelling participants at speeds up to four times their usual swimming pace. This exhilarating natural current, which can run at 8 knots, offers a distinctive and enjoyable challenge for swimmers.

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.

The Chillswim Windermere 11 Miles End to End is a premier open water swimming event set in the picturesque Lake District. Scheduled for Saturday, September 6, 2025, this swim offers participants the opportunity to traverse the full length of Windermere, starting at Fell Foot Park in the south and finishing at Waterhead in the north. The route is approximately 11 miles (17.7 kilometers) long, with swimmers keeping within approximately 50 meters of the shore after the first 2 miles.

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.

The Chillswim Coniston 5.25 Miles End to End is a premier open water swimming event held on Saturday, June 21, 2025, in the picturesque Lake District. Participants will swim the full length of Coniston Water, starting at the southern end and finishing at the northern tip near Monk Coniston Car Park.

The 4 Mile Henley Swim is a challenging open water race set in the River Thames at Temple Island Meadows during the Henley Swim Festival. This swim is perfect for those looking to test their endurance over a longer distance, offering a scenic and rewarding course along the historic river. With a mass start, participants will experience the thrill of open water racing in one of the UK’s most iconic swimming locations.

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.

The 1 Mile Henley Swim is a classic open water challenge set in the River Thames at Temple Island Meadows during the Henley Swim Festival. Swimmers can choose between two start options: the Mass Start, for those who enjoy a competitive, race-style experience, or the Rolling Start, which offers a more relaxed and staggered entry into the water. This scenic swim provides a rewarding challenge for both new and experienced open water swimmers looking to enjoy the historic Henley course.

The ½ Mile Henley Swim is a fantastic open water challenge set in the River Thames at Temple Island Meadows during the Henley Swim Festival. Ideal for swimmers looking to progress beyond shorter distances, this scenic swim offers a taste of open water racing in a historic and picturesque setting, making it a great stepping stone for those aiming for longer events.

The 200m Henley Splash is an open water swim event suitable for participants aged 8 and above, taking place entirely within the event village at Temple Island Meadows during the Henley Swim Festival. This short-distance swim offers a family-friendly introduction to open water swimming in the River Thames.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

The Dock2Dock swim offers a unique opportunity to experience open water swimming in the heart of London’s Royal Docks. With towering historical cranes lining the water and the iconic skyline of Canary Wharf and the O2 Arena in the background, this event combines the thrill of urban swimming with the challenge of long-distance racing.

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.

The 5K Great North Swim is a demanding event for swimmers aged 16 and over, covering a distance of 5,000m—equivalent to 200 lengths of a standard 25m pool. The average completion time is around 1 hour 30 minutes to 2 hours, with a cut-off time of 1 hour to reach the halfway point and a final 2-hour completion deadline. Full support is provided with lifeguards, kayakers, and safety boats, ensuring a safe experience in the beautiful Lake Windermere. This race is ideal for experienced swimmers looking for a serious challenge in a stunning open water setting.

The 2 Mile Great North Swim is a challenging event for swimmers aged 16 and over. Covering 3,200m—roughly 125 lengths of a standard 25m pool—this swim is perfect for those looking to test their endurance in open water. The average completion time is around 1 hour 15 minutes. With full support from lifeguards, kayakers, and safety boats, swimmers can enjoy the stunning Lake Windermere while feeling secure in the well-supported environment. A great choice for swimmers ready to take on a longer distance in a beautiful and safe setting.

The 1 Mile Great North Swim is an exciting challenge for swimmers aged 16 and over, offering a step up from the shorter distances. This event covers 1,600m, equivalent to 64 lengths of a standard 25m pool. The average completion time is around 30–50 minutes. The course is fully supported with lifeguards and safety boats, ensuring a safe and enjoyable experience. Ideal for those looking to push their limits and experience the thrill of open water swimming in the stunning Lake Windermere.

A perfect introduction to outdoor swimming, the ½ Mile distance is equivalent to 32 lengths of a standard 25m pool. The average completion time is around 20 minutes.

If you're eager to try open water swimming but unsure where to begin, the Great North Swim250 is the perfect introduction. Designed for new or nervous swimmers, families, and children aged 8 and over, this event offers a chance to ease into open water swimming in a safe and supportive environment. It’s a great way to test the waters and experience the thrill of swimming outdoors!

Not for the faint-hearted however this swimrun has it all. Swims of up to 2km, pristine trails, uninhabited islands, 10 islands, potential for seals to cheer you on, some of the best view points on Scilly. There really is nothing else like this event!