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!

Enjoy early bird prices with 30% off until 1 June.

Donate today
Register now
FAQs
2024 results

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 £133

Team £266

400m swim

21.2km cycle

5km run

Kirkland & Ellis Olympic Triathlon

Individual £133

Team £266

1500m swim

42.4km cycle

10km run

PwC Challenge Triathlon

Individual £133

Team £266

800m swim

31.8km cycle

7.5km run

Duathlon

Individual £133

Team £266

5km run

31.8km cycle

5km run