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Dorney Triathlon

Sign up to take on this challenge with us. Have a place already? You can join our team.

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Breast Cancer Now runners at the Royal Parks half marathon 2026 and the Breast Cancer Now cheerpoint.

About the event

You get to race around this inspiring Olympic venue in the Dorney Triathlon. Known for being a flat course, this is your chance to achieve that personal best.

The triathlon events have finished for 2026, but you can still sign up to duathlon events.

You can find out more about the challenge on the organiser’s website.

This event is organised and hosted by RunThrough and Active Training World.

We'll support you all the way

  • Breast Cancer Now running vest or cycling jersey and swimming cap

  • Plenty of fundraising and training support

  • Regular e-newsletters to keep you up to date

  • Support from a dedicated member of the team

Why your support matters

39% of women

Over a third of women in the UK do not check their breasts regularly for potential signs of breast cancer.

55,000 women

Around 55,000 women and 400 men are diagnosed with breast cancer every year in the UK.

1 in 7 women

One in seven women in the UK will develop breast cancer in their lifetime.

Ask us about the Dorney Triathlon

Have a question about the triathlon? You can call us on 0345 092 0804 or pop us an email.

Email us

What else is on?

People wearing Breast Cancer Now pink running tops whilst running in the street at the London Landmarks half marathon.
Triathlons and duathlons

London T100

London
21 Aug 2027 - 22 Aug 2027
various
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