London T100 Triathlon

Event Type Triathlon
Date 28 July 2024
Location London
Registration Fee £52
Fundraising Target £400 - £800

London T100 is the world's biggest city centre triathlon. 

Open to all abilities, London T100 offers several distances to get involved in including Super Sprint, Sprint, Sprint Relay, Olympic, Olympic Relay and the brand-new Middle distance.

Secure your entry today and race past some of London’s iconic landmarks.

Running for Alzheimer’s Society

Join team Alzheimer's Society at London T100 and feel amazing about giving help and hope to people living with dementia. You’ll need to pay a registration fee of £52 and set a fundraising target of £400 for the Sprint/Super Sprint/Olympic option or £800 for the middle distance. We'll be there to support you every step of the way. 

Sign up now

When you run for us, you'll receive:

  • a free running top to wear on race day
  • detailed training guides for different abilities and personalised support from our experts
  • access to a Facebook group where you can chat to other runners
  • support from our dedicated events team to help you smash your fundraising target

Fundraising for Alzheimer's Society

We know that fundraising can be just as challenging as the event, but our expert team will be on hand to help. We’ll be in regular contact with support, advice and ideas.


Kick-start your fundraising by setting up a JustGiving page. You can easily share your page with your friends, family and colleagues on social media and email, plus everything happens automatically.

The money you donate is sent to us, Gift Aid collected, and your sponsors thanked. Job done!

Fundraising for your event

From posters and sponsorship forms to social media badges and advice on promoting an event, find all the resources you need to smash your fundraising in our hub.

Go to the fundraising hub

Frequently asked questions

You can order your top when you complete our registration form by contacting the team here with your size (XS to XXL) and style (vest/t-shirt).

If you have let us know your size, we will send your top to you in the post approximately a month before race day.

We’ll send out a link to our Training Zone by email. Here you will find our training guide and plans for every ability plus loads of other advice covering areas including nutrition, injuries and tapering. 

We’ll also give you contact details for our expert running coaches, so you get in touch directly with any questions.

If you’re collecting money on a JustGiving page, there’s nothing you need to do, your sponsorship comes directly to us.

If you have collected any cash, you can bank it and pay in using one of these options: 

  • Pay the donations directly onto your JustGiving page if you have one.
  • Pay in online using our secure payment page.
  • Send a cheque made payable to Alzheimer’s Society to Alzheimer’s Society, Suite 2, 1st Floor, East Wing, Plumer House, Tailyour Road, Plymouth, PL6 5FS. Please include our paying in form so we have your event details.
  • Pay over the phone with a credit or debit card. Call our lovely customer care team on 0300 222 5808.

We ask that you please send in all donations within 6 weeks of the event.

Of course! 

The fundraising target for charity places is still £400 or £800 per person (depending on chosen distance) but you're welcome to combine your targets into one team total.

This event is open to everyone aged 18 or over on race day.

Contact us about this event

Got a question about this event? Get in touch and we'll respond as soon as we can. 

Ask a question
Call the events team