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 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!
- 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
- £115.99-£141.99
Snowman Standard Triathlon
A legendary mountain triathlon in Snowdonia: cold-water swim, brutal climbs, tough trail run and iconic views — a true test for determined, adventure-hungry athletes.
- 1500 m lake swimming
- 69.3 km road cycling + 3753 ft ascent
- 8.7 km multi terrain running + 2276 ft ascent
- 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.
- Ironman
- Half Ironman
- 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
- Sat 8 Aug
- £98-£119
ATW St Neots Standard Triathlon | Race 2
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a Standard Triathlon.
- 1500 m river swimming
- 45 km road cycling + 712 ft ascent
- 10 km road running
- Sun 16 Aug
- £76-£97
ATW Oundle Sprint Distance Triathlon
The UK's largest triathlon organiser brings you the Oundle Sprint Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
- 600 m pool swimming
- 25 km road cycling + 561 ft ascent
- 5 km trail running + 30 ft ascent
- 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
- £98.99-£259.99
Triathlon Y Bala
Start with a water swim in beautiful Llyn Tegid against a mountain backdrop, then push through scenic bike and run routes on fully closed roads around Bala, North Wales.
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sun 6 Sep
- £95-£120
Helvellyn Triathlon
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.
- 1.5 km lake swimming
- 59 km road cycling + 990 m ascent
- 15 km fell running + 931 m ascent
- Sun 13 Sep
- £73-£108
Aviemore Triathlon
Escape to the Cairngorms for an adventure triathlon in the scenic waters of Loch Morlich, then mountain biking and trail running in Glenmore Forest. Go Short Fast Durty or Long Hard Durty.
- Sprint triathlon
- Olympic triathlon
- Sun 13 Sep
- £59.50-£74.50
Woking Autumn Triathlon & Junior Aquathlon | Sprint Triathlon
Dive into clear waters, ride fast on quiet roads and run strong at a friendly, Sprint Triathlon challenge for all ages and abilities.
- 400 m pool swimming
- 20.6 km road cycling + 249 ft ascent
- 5 km trail running + 75 ft ascent
- Sun 20 Sep
- £30-£97
Eton Dorney Triathlon & Swims
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for all levels of triathletes and swimmers to enjoy in an exclusive setting.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Lake swim 4
- Sun 20 Sep
- £98-£119
ATW St Neots Standard Triathlon | Race 3
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a Standard Triathlon.
- 1500 m river swimming
- 45 km road cycling + 712 ft ascent
- 10 km road running
- Sat 26 Sep
- £58-£120
Dorney Triathlon | September
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 26 Sep
- £97-£118
ATW Grafham Triathlon | Standard Triathlon
Athletes of all levels are guaranteed to enjoy The Standard Triathlon at this fantastic venue that has been used for award-winning triathlons, national championships and GB qualifier races!
- 1500 m lake swimming
- 38 km road cycling + 748 ft ascent
- 10 km road running
- Sun 27 Sep
- £76.99-£259.99
Superfeet Sandman Triathlon and Duathlon
An unforgettable adventure triathlon, The Sandman has been described as one of the most beautiful and thrilling multi-terrain races in the UK, offering a unique experience for athletes of all levels.
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint duathlon
- Sat 3 Oct
- £215-£260
THE ROC SCOTLAND
THE ROC takes in the Highlands. Kinlochleven to the summit of Ben Nevis and back, including a Loch swim, stunning mountain/gravel bike sections and the UK's highest mountain!
- 1 km lake swimming
- 52 km mountain biking
- 18 km multi terrain running
- Sun 18 Oct
- £49
Minehead Triathlon
An award-winning coastal triathlon set among the safety of the sandy bay, featuring a fast bike route with Exmoor as the backdrop and a promenade run with beach finale!
- 750 m sea swimming
- 20 km road cycling
- 5 km multi terrain running
- Sun 3 May
- £20-£99
Horwich Triathlon, Multisport & Trail Runs
- Sprint triathlon
- Olympic triathlon
- Sprint duathlon
- Standard duathlon
- Sprint aquathlon
- + 5 more races
- Sat 30 - Sun 31 May
- £35-£95
Northumberland Festival of Sport
- Lake swim 3
- Kids triathlon 4
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Sat 4 - Sun 5 Jul
- £25-£105
Woodhorn Museum Triathlon
- Lake swim 3
- Kids aquathlon 8
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Sun 12 Jul
- £45-£179
Eastbourne Triathlon and Multisport Festival
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Charity swim
- Sprint aquathlon
- + 3 more races
- Sun 19 Jul
- £70
Compton Verney Sprint Triathlon | Sprint Triathlon Relay
- 750 m lake swimming
- 23 km road cycling + 181 m ascent
- 5 km multi terrain running + 75 m ascent