Triathlons

• Sun 21 Jun
• £75-£110

Southend Triathlon

Take on an exciting coastal triathlon in Southend, featuring a sea swim, fast seafront cycle, and scenic run with fantastic crowd support all the way.

• Sprint triathlon
• Olympic triathlon
• Relay triathlon
• Standard aquabike

• Sat 27 - Sun 28 Jun
• £20-£99

ATW Triathlon | Mallory Park

Mallory Park Triathlon Extravaganza: A traffic-free triumph! A thrilling and safe circuit nestled in picturesque surroundings, boasting its own self-contained swimming lake.

• Super sprint triathlon
• Sprint triathlon
• Super sprint aquabike
• Sprint aquabike
• Novice triathlon

• Sat 27 Jun
• £20-£31

ATW Childrens Triathlon Mallory Park

Mallory Park Junior Triathlon: Where dreams take flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.

• Kids triathlon 5

• Sun 28 Jun
• £94.99-£141.99

Wild Horse Brewing Co. Llandudno Triathlon & Duathlon

Race the North Wales coast in a spectacular multi-sport challenge, combining sea air, closed roads and iconic scenery in a fast, friendly triathlon and duathlon setting.

• Sprint triathlon
• Olympic triathlon
• Standard duathlon

• Wed 1 Jul
• £58-£78

Midweek Dorney Triathlon | July

Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

• Super sprint triathlon
• Sprint triathlon
• Sprint aquabike

• Sun 5 Jul
• £36-£90

English Riviera Triathlon

Fast, exciting, spectator-friendly racing in the centre of Torquay! Swim from the sheltered Torre Abbey Sands beach, ride a fast and flattish closed-road circuit and run by the sea.

• Sprint triathlon
• Olympic triathlon
• Super sprint triathlon
• Kids triathlon 2
• Sprint aquathlon
• + 1 more race

• Sun 5 Jul
• £69-£175

ATW Odyssey At Box End Triathlon

Get ready for one of the UK’s most exciting triathlon events of the year! Dive into crystal-clear lake waters at Box End, then ride a smooth, rolling bike course and follow scenic on-site run paths.

• Sprint triathlon
• Olympic triathlon
• Half Ironman
• Sprint aquabike
• Standard aquabike
• + 1 more race

• Sat 11 - Sun 12 Jul
• £20-£100

Ripon Triathlon Festival

A family-friendly event in partnership with the Brownlee Foundation, for triathletes of all skill levels including a Sprint, Standard, Middle distance tri, Swims, Aquabike, Relay and Juniors.

• Lake swim 2
• Sprint triathlon
• Sprint aquabike
• Standard aquabike
• Olympic triathlon
• + 5 more races

• Sun 12 Jul
• £65-£115

ATW Bristol Triathlon

Swim, bike, and run through an iconic city backdrop with a flat, fast course and incredible atmosphere — one of the UK's most-popular 'closed-road' triathlons.

• Sprint triathlon
• Sprint aquabike
• Olympic triathlon
• Standard aquabike

• Sun 12 Jul
• £58-£120

Dorney Triathlon | July

Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

• Super sprint triathlon
• Sprint triathlon
• Olympic triathlon
• Sprint aquabike
• Standard aquabike

• Sat 18 Jul
• £265-£293
• Early bird

Castle To Coast Triathlon

A one-of-a-kind triathlon adventure from castle to coast – swim, bike, run and soak up the best of the North and South Downs, fully supported all the way, no navigation needed!

Early bird on now

• 1.2 miles lake swimming
• 66 miles road cycling + 3550 ft ascent
• 14 miles trail running + 1512 ft ascent

• Sun 26 Jul
• £58-£120

Dorney Triathlon | July

Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

• Super sprint triathlon
• Sprint triathlon
• Olympic triathlon
• Sprint aquabike
• Standard aquabike

• Sun 26 Jul
• £42.99-£259.99

Snowman Triathlon, Duathlon and Swims

Awarded the Event of the Year (2021) in the Welsh Triathlon Awards, The Snowman is well known as the toughest multi-terrain triathlon and duathlon in the UK. Not for the faint-hearted.

• Sprint triathlon
• Olympic triathlon
• Half Ironman
• Sprint duathlon
• Lake swim 2

• Sat 1 Aug
• £60-£85

ATW Mallory Park Triathlon - Incorporating the 2027 European Age Group Championship Sprint Triathlon Qualifier

Mallory Park delivers a fast, unforgettable triathlon experience with smooth tarmac, a traffic-free circuit and a clean enclosed lake — an exhilarating, athlete-friendly venue.

• Super sprint triathlon
• Sprint triathlon

• Sat 8 Aug
• £145-£285
• Early bird

ATW Odyssey Triathlon

Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.

Early bird on now

• Ironman
• Half Ironman

• Sat 8 Aug
• £67-£119

ATW St Neots Triathlon | Race 2

Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.

• Sprint triathlon
• Olympic triathlon
• Standard aquabike
• Sprint aquabike

• Sat 8 Aug
• £58-£120

Dorney Triathlon | August

Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

• Super sprint triathlon
• Sprint triathlon
• Olympic triathlon
• Sprint aquabike
• Standard aquabike

• Sat 8 Aug
• £56-£285

ATW First To Full Triathlon Festival

Be part of a UK first. This isn’t just another triathlon—it’s the first event of its kind where you decide the distance, from sprint to full, and race your way.

• Sprint triathlon
• Olympic triathlon
• Half Ironman
• Ironman
• Sprint aquabike
• + 4 more races

• Sun 16 Aug
• £56-£97

ATW Oundle Triathlon

ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.

• Super sprint triathlon
• Sprint triathlon
• Sprint aquabike

• Sun 16 Aug
• £22-£31

ATW Oundle Children’s Triathlon

A fun, friendly and fully supported triathlon for children of all abilities — perfect for first-timers looking to experience the thrill of swim, bike and run in Oundle.

• Kids triathlon 5

• Sat 22 Aug
• £250

THE RESTLESS Gravel XTRI

Take on a wild Scottish adventure combining a cold-water loch swim, epic gravel ride and tough mountain run through the breathtaking landscape of the Arrochar Alps.

• 1.8 km lake swimming
• 50 km gravel riding + 2000 m ascent
• 25 km fell running + 1200 m ascent

• Wed 26 Aug
• £58-£78

Midweek Dorney Triathlon | August

Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

• Super sprint triathlon
• Sprint triathlon
• Sprint aquabike

• Sun 30 Aug
• £69-£260

Wimbleball Triathlon

A superb triathlon venue which hosted Ironman 70.3 for ten years! Experience dramatic hills, pristine open water and wild Exmoor scenery in a tough, rewarding multisport challenge of your choice.

• Olympic triathlon
• Half Ironman
• Ironman
• Standard aquabike
• Standard aquathlon

• Sat 5 Sep
• £215-£260

THE ROC ENGLAND

Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.

• 1.5 km lake swimming
• 92 km road cycling
• 18.5 km multi terrain running

• Sun 6 Sep
• £75-£120

Helvellyn Triathlon & Aquabike

Take on one of the UK’s toughest triathlons – a legendary Lake District challenge where brutal climbs, wild beauty and sheer determination define every mile.

• Olympic triathlon
• Standard aquabike