Relay triathlons in UK in August 2026

• Sat 8 Aug 2026
• £140-£275
• 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
• Newcomers
• 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
• £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.

• Enter online
• Age 17 & over

• 1500 m river swimming
• 45 km road cycling + 712 ft ascent
• 10 km road running + 0 ft ascent

• Sun 16 Aug 2026
• £74-£95

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 + 561 ft ascent
• 5 km trail running + 30 ft ascent