Join us at the beautiful and iconic Grafham Water to experience one of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes.

ATW Grafman was voted National Event of The year 2014, hosted the Triathlon England Middle Distance Championships in 2015 and 2023 and the British Championships in 2016. 

This event is open to everyone, regardless of ability and there are plenty of activities at the venue to keep the whole family entertained while you race. There is an overall cut off time for the event of 9 hrs 30 mins.

This race has a draft illegal bike leg.

For those wanting the challenge of the Swim-Bike, but without the run, take on the Grafman Aquabike, with your race finishing at the entrance back in to transition after the bike leg.

Registration and Transition opening times will be advised in the final details.

Follow GRAFMAN TRIATHLON on Facebook to keep up to date with the latest event updates & coverage!

Need to hire a wetsuit? We are pleased to be able to offer Zone3 wetsuits. More information              

REASONS TO ENTER THIS EVENT 

1.9K swim with an 'Aussie style' exit at the half way stage of the swim, 90K bike course on quiet country lanes,  21K run course with fantastic views of Valve Tower, Aquabike & relay option, Custom designed medal, Water & nutrition stations, Finish line snacks & goodies, Supportive marshals, Well-marked course, Over 50 reviews on Racecheck, On-site cafe & playground for family spectators.