Triathlon: the Treble Challenge

Show dementia what you’re made of with the Treble Challenge.

Challenge yourself to run, cycle and swim between 1 April and 31 December 2021. Finish the events indoors or out on the road, in any order, and over any distance you like – and raise money to fund life-changing dementia research. It’s the triathlon with a real difference.

Sign up

Which challenge will you choose?

It doesn’t matter if you’re a fitness fanatic or complete beginner, the Treble is all about setting and smashing your own targets.     

Pioneer: Swim 10km, cycle 500km, run 100km.

Epic: Swim 30km, cycle 1,500km, run 300km.

Maverick: Choose your own distance for each event!

Tri kit for £50

Buy the Tri kit for a discount price (a swimming cap, running top, cycling jersey and neckwarmer) or raise £400 to receive it for free!

Alzheimer's Research UK water bottle

Stay hydrated with our metal water bottle whilst also reducing the amount of plastic you use - win win!

Alzheimer's Research UK sports hat

Our ARUK hat is ideal for keeping the sun out on those scorching runs or simply as a great accessory to show your support.


Pounds raised

Kilometres logged

Get involved for that feeling…

When you push yourself further

This is the ultimate chance to push your fitness to the limit. Brave the Epic Treble Challenge before 31 December, or set your own targets. Whatever distance you choose, you’ll feel amazing when you reach that goal!

When you boost your fitness

Get fit – without getting bored! With the Treble, you can try out three different sports and tailor your goals to the ones you most enjoy. Plus, it will keep your focus and motivation stronger than ever.

When you raise money for research

Every penny you raise will help us reach our goal of finding a life-changing treatment for dementia. And if you manage to raise £400, you’ll get a running T-shirt, swimming hat and cycling jersey thrown in too!

Show your support on social media

Add an overlay to a picture of you to show your friends you're helping to bring about life-changing breakthroughs.

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Step 2:Select an overlay