ATW Grafman Middle Distance Triathlon

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!

Want to hire a wetsuit for the season? We are proud to offer Zone3 wetsuits. Find out more HERE

Want to hire a wetsuit for a day, weekend or month? Find out more HERE

We are delighted to let you know that Grafham Water Center is now able to offer dormitory style accommodation, the night before the event. Take the stress away from getting on site in time for the event by staying over night. You can book your accommodation HERE    

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.

Purchase your 2026 event t-shirt now and collect on event day from the registration stand.

Read reviews on Racecheck

 

Charity - Join us in making every stride count by raising money for our partner charity, Alzheimers Research UK - your run will not only challenge your limits but also change lives, one step at a time, for a cure. Opportunities to donate and fundraise will appear at checkout.

ATW Transfer & Refund Policy

At ATW, we understand that sometimes plans change. While we do not offer refunds or transfers to another person, we provide a hassle-free event transfer option for those unable to attend their booked event. If you are unable to participate in your scheduled event for any reason—including injury, illness, pregnancy, bereavement, or other unforeseen circumstances—you can transfer your entry to any future ATW event. There is no proof required, we trust you!
Even better news, transfers can be made all the way up to 48 hours before your original event date.

Event Organiser

ATW was established in 2011 by James Shipley. We have now become a national events company in the UK, specialising in Running, Triathlon, Duathlon, Aquathon, Cycling, Swimming and all permutation of swim-bike run events. With over 40,000 entries a year ATW has become a firm favourite amongst people who are determined to Dream, Believe and Achieve.