Relay triathlons in UK
Find relay triathlons in UK in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sat 9 May
- £225-£650
THE ROC WALES
The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.
- 1.5 km sea swimming
- 100 km road cycling
- 13 km multi terrain running + 3330 ft ascent
- Sat 16 May
- £79-£185
ATW Big East & Maldon Triathlon
The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Half Ironman
- Middle aquabike
- Sat 16 May
- £47.50-£107.50
Keswick Mountain Festival | Sprint Triathlon
One of the most thrilling triathlons in the country on a super-exciting route with challenging ascents, descents and open roads, narrow in parts. Includes Full Weekend Festival Ticket in the price!
- 400 m lake swimming
- 18 km road cycling
- 5 km trail running
- Sun 17 May
- £67-£135
Roadford Lake Triathlon
Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sat 23 May
- £44-£63
Cotswolds Lake 62 Spring Events | Sprint Triathlon
Swim in a private Cotswolds lake, ride scenic country roads and run within an exclusive venue at this family-friendly multisport summer event.
- 750 m lake swimming
- 24 km road cycling
- 6 km trail running
- Sat 23 May
- £140
ATW Box End Mixed Team Relay
Unleash your team’s speed and strategy in an exhilarating mixed relay, racing through swim–bike–run laps at Box End’s stunning, spectator-friendly lakeside venue.
- 350 m lake swimming
- 7.7 km road cycling + 102 ft ascent
- 1 km road running
- Sun 24 May
- £69-£145
ATW Box End Triathlon
Experience a choice of multi-sport events — triathlon, relay triathlon and aquabike — at a stunning watersports venue with pristine water, scenic routes, a custom medal and more.
- Sprint triathlon
- Sprint aquabike
- Olympic triathlon
- Standard aquabike
- Half Ironman
- + 1 more race
- Sat 6 Jun
- £58-£120
Dorney Triathlon | June
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 7 Jun
- £166-£187
ATW Grafman Middle Distance Triathlon
Take on a superb middle distance triathlon at the fantastic Grafham Water. Suitable for all abilites, with a challenging, but achievable course, and custom medal at the finish line.
- 1900 m lake swimming
- 90 km road cycling + 1680 ft ascent
- 21 km multi terrain running
- Sun 7 Jun
- £75-£90
Dartmouth Triathlon | Sprint
Swim in the clear waters of Blackpool Sands, then take a scenic coastal bike route featuring Devon's flattest road, then run by a stream. Plus chance to camp on the beach!
- 750 m sea swimming
- 20 km road cycling + 1067 ft ascent
- 5 km road running + 228 ft ascent
- Sun 14 Jun
- £80-£195
Weymouth WMD Triathlon
Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.
- Half Ironman
- Olympic triathlon
- Sprint triathlon
- Sun 14 Jun
- £85.99-£449.99
Slateman Triathlon & Duathlon
The most iconic multi-sport adventure race in Wales, combining a lake swim, brutal mountain climbs and a demanding run through Snowdonia’s dramatic, awe-inspiring landscape.
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Ironman
- Standard duathlon
- Sun 21 Jun
- £69-£120
ATW Stewartby Lake Triathlon & Aquabike
Dive into the ATW Stewartby Lake Triathlon and Aquabike – a flat, fast and friendly race offering stunning lake views, smooth roads, and surefire PB potential.
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- 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
- 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
- Sun 28 Jun
- £79-£99
ATW Sprint Triathlon | Mallory Park
Mallory Park Triathlon Extravaganza: A Traffic-Free Triumph! A thrilling and safe circuit nestled in picturesque surroundings, boasting its own self-enclosed swim lake for a Sprint Tri.
- 750 m lake swimming
- 20 km road cycling + 790 ft ascent
- 5 km road running + 80 ft ascent
- Sat 4 - Sun 5 Jul
- £25-£130
Woodhorn Museum Triathlon
Race through history and nature at a championship-grade triathlon set in a unique heritage landscape; fast, scenic, and proven on the world and European stage, for all ability levels.
- Lake swim 3
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- + 6 more races
- Sun 5 Jul
- £69-£185
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
- Sun 5 Jul
- £61-£78
Cotswolds Lake 62 Summer Events | Triathlon
Swim in a private Cotswolds lake, ride scenic country roads and run within an exclusive venue at this family-friendly multisport summer event.
- 1500 m lake swimming
- 39 km road cycling
- 10.5 km trail running
- Sun 5 Jul
- £70-£74
English Riviera Triathlon | Sprint Triathlon
A fast, exciting, spectator-friendly, draft-legal Sprint Triathlon in Torquay! Swim from the sheltered Torre Abbey Sands beach, ride a fast and flattish closed-road circuit and run by the sea.
- 750 m sea swimming
- 20 km road cycling + 656 ft ascent
- 5 km road running + 135 ft ascent
- Sat 11 - Sun 12 Jul
- £21-£100
Ripon Triathlon Festival
A family-friendly event in partnership with the Brownlee Foundation, for triathletes of all levels including a Sprint, Standard (Olympic), 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
- £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 12 Jul
- £110-£130
ATW Bristol Standard 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' Standard triathlons.
- 1500 m lake swimming
- 42 km road cycling + 144 ft ascent
- 10 km road running + 174 ft ascent
- Sat 18 Jul
- £270-£295
- 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!
- 1.2 miles lake swimming
- 66 miles road cycling + 3550 ft ascent
- 14 miles trail running + 1512 ft ascent
- Sun 19 Jul
- £55
Clevedon Triathlon
An amazing celebration weekend of swim-bike-run using the magnificent Marine Lake with the glorious Victorian Clevedon Pier as the backdrop, sea views, promenade and top reviews!
- 750 m lake swimming
- 20 km road cycling
- 5 km multi terrain running