Triathlon

Impetus Triathlon returns to Dorney Lake on 13 September 2025 for its 11th year. Join us for an exciting day of racing, fundraising, and fun, all in aid of Impetus.

Registration is now open, so reserve your spot and join the challenge today!


Donate today
Register now
Fundraising pack
FAQs

Whether you want to take on a solo Olympic Triathlon or are looking to assemble a team to swim, run and cycle your way to victory there are race options to suit all abilities. Take on a challenge in aid of a great cause.

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2025 Distances

Each of our four races can be entered as either an individual or team (of two or three).
Advent International Sprint Triathlon

Individual £190

Team £380

400m swim

21.2km cycle

5km run

Kirkland & Ellis Olympic Triathlon

Individual £190

Team £380

1500m swim

42.4km cycle

10km run

PwC Challenge Triathlon

Individual £190

Team £380

800m swim

31.8km cycle

7.5km run

Duathlon

Individual £190

Team £380

5km run

31.8km cycle

5km run