Relay triathlons in UK

• Sat 18 Jul 2026
• £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

• Beginner-friendly
• Chip timing
• Enter online
• Event village
• Rural
• Age 18 & over

• 1.2 miles lake swimming
• 66 miles road cycling
• 14 miles trail running

• Sun 26 Jul 2026
• £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.

• Recycling
• Beginner-friendly
• Event village
• Sustainability policy
• Public transport links
• Age 15 & over

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

• Sat 8 Aug 2026
• £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

• Families
• Recycling
• Entertainment
• Music
• Event village
• Park
• Rural
• Sustainability policy
• Age 19 & over

• Ironman
• Half Ironman

• Sat 8 Aug 2026
• £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.

• Recycling
• Beginner-friendly
• Event village
• Sustainability policy
• Public transport links
• Age 15 & over

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

• Sat 8 Aug 2026
• £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.

• Beginner-friendly
• Entertainment
• Event village
• Park
• Age 15 & over

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

• Sat 8 Aug 2026
• £96-£117

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.

• Chip timing
• Enter online
• Age 17 & over

• 1500 m river swimming
• 45 km road cycling
• 10 km road running

• Sun 16 Aug 2026
• £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.

• Chip timing
• Enter online
• Age 15 & over

• 600 m pool swimming
• 25 km road cycling
• 5 km trail running

• Sat 5 Sep 2026
• £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.

• Recycling
• Plastic bottle free
• Music
• Chip timing
• Enter online
• Mountainous
• Event village
• Rural
• Mountains
• Sustainability policy
• Plastic-free event
• Age 18 & over

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

• Sun 6 Sep 2026
• £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.

• Chip timing
• Enter online
• Mountainous
• Age 17 & over

• 1.5 km lake swimming
• 59 km road cycling
• 15 km fell running

• Sun 13 Sep 2026
• £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.

• Recycling
• Beginner-friendly
• Event village
• Sustainability policy
• Age 15 & over

• Sprint triathlon
• Olympic triathlon

• Sun 13 Sep 2026
• £49.50-£64.50

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.

• Chip timing
• Enter online
• Flat
• Age 15 & over

• 400 m pool swimming
• 20.6 km road cycling
• 5 km trail running

• Sun 20 Sep 2026
• £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.

• Families
• Recycling
• Beginner-friendly
• Dogs allowed at venue
• Event village
• Urban
• Park
• Rural
• Free venue entry
• Age 15 & over

• Super sprint triathlon
• Sprint triathlon
• Olympic triathlon
• Lake swim 4

• Sun 20 Sep 2026
• £96-£115

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.

• Chip timing
• Enter online
• Age 17 & over

• 1500 m river swimming
• 45 km road cycling
• 10 km road running

• Sat 26 Sep 2026
• £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.

• Recycling
• Beginner-friendly
• Event village
• Sustainability policy
• Public transport links
• Age 15 & over

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

• Sat 26 Sep 2026
• £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!

• Chip timing
• Enter online
• Age 17 & over

• 1500 m lake swimming
• 38 km road cycling
• 10 km road running

• Sat 3 Oct 2026
• £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!

• Recycling
• Plastic bottle free
• Music
• Chip timing
• Enter online
• Hilly
• Mountainous
• Event village
• Rural
• Mountains
• Sustainability policy
• Plastic-free event
• Age 18 & over

• 1 km lake swimming
• 52 km mountain biking
• 18 km multi terrain running