CHALLENGE YOURSELF TO TACKLE A 100KM CENTURION IN 2025!

JOIN US ON SUNDAY 18th MAY 2025 FOR A UNIQUE EVENT EXPERIENCE DELIVERED BY THE LARGEST MULTISPORTS ORGANISER IN THE UK!

The Metric Centurion distance involves a 2.2km swim in the crystal clear Box End Lake, an 81km road bike on fast country roads, and finishing with a 20km offroad run. This 100K triathlon distance being made popular by the PTO race series, is ideal for anyone who is training for a 70.3 Half-Iron distance or simply wanting to take the next step up from a Standard distance triathlon.

Alongside this unique challenge, you can also take on the usual distances of a:
- Standard Triathlon (1.5k swim, 40k Bike, 10k run)
- Sprint Triathlon (750m swim, 26k Bike, 5k run)  Bookable via our Box End Triathlon page 

Anyone who doesn't want to take part in the run, there is an Aquabike (swim-bike) option for the Metric Centurion, and for those who would like to compete as a team, there is a relay option, with or 2 or 3 individuals sharing the disciplines between them.

This event has a non-draft legal bike leg.

Camping is now available at Box End Park.  For more information and to book your camping tickets, click HERE

Transgender athletes are, and will continue to be, very welcome at recreational and competitive activity in Triathlon. At any competitive event from 1st January 2023, there will be a Female category open to athletes who are the female sex at birth and an Open category open to all other athletes.

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

Reasons to enter this event:

Beautiful venue

Crystal clear waters

Well marked course

Supportive marshals

FREE event photos

Custom designed medal

Finish line snacks & goodies