The Ironman Triathlon has been widely regarded as the ultimate single-day endurance challenge. To date, over half a million people have completed an Ironman distance triathlon. 255 Triathlon presents a new single-day endurance challenge which will push your endurance limits to a new level.


Athlete Guide

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The inaugural 255 Triathlon will take place on Sunday 8th August at Goodwood Motor Racing Circuit, West Sussex. The first edition of the race will be limited to 300 competitors, swimming in the nearby Westhampnett Lake before making their way onto the historic motor racing circuit. After completing 52 traffic-free laps on the bike, athletes will head out onto the run for ten laps on the circuit’s perimeter. Competitors tackling this ultra-endurance event will have up to 18 hours to complete the distance.

The Race - 255 UK, Goodwood

The inaugural 255 Triathlon will take place on Sunday 8th August at Goodwood Motor Racing Circuit (less than 80 miles from London). The race will offer a unique experience for both participants and spectators:

  • 255km of traffic-free racing
  • An incredible atmosphere
  • Support throughout the day
  • An historic location for this historic event
Race Details

A race experience like no other...

This traffic-free, multi-lap format will offer a unique race experience for both participants and spectators. The pit lane will provide the focal point of the event with spectators able to support athletes continuously throughout the day. With music, commentary, live lap timing and leaderboards, this will provide a race experience like no other.

The next level for endurance triathletes

"Ironman has always been widely regarded as the ultimate single-day endurance event. Now it's the time to introduce the next step for endurance triathletes. 255 Triathlon will not only push competitors to a new level of physical and mental endurance but will also provide an unparalleled level of engagement for spectators throughout the whole event."

Payment Plan Available
Entering a long-distance triathlon is not only a massive physical commitment but is also a significant financial commitment. With this in mind, we are pleased to announce a new payment plan option for competitors wishing to secure their place in the first ever 255 Triathlon. An initial, non-refundable payment of £120 will guarantee your place in the event. The remaining balance of £240 will be due by the 27th June 2021.

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