24th January - 25th January 2026
London Winter Walk
A great event to walk off the Christmas celebrations, and to kick start your New Year fitness regime! Join our London Winter Walk.
Walk, jog or run up to 100km along the glorious World Heritage Coastline with Team Dementia UK.
Will you walk, jog or run the spectacular World Heritage Coastline to help families facing dementia this May? The Jurassic Coast Ultra Challenge will see up to 3,000 adventurers, individually and as part of teams, take on distances from 10km to 100km in the UK’s number one series of treks and trail challenges.
Starting at Dorset’s Corfe Castle, the scenic countryside route heads down to Swanage, through Lulworth Cove and past Durdle Door, with ups and downs to the Weymouth halfway point. Full 100km challengers will continue past Portland Bill and Chesil Beach, heading on to West Bay before finishing in the vibrant town of Bridport.
You’ll be supported by enthusiastic staff and volunteers along your route, with plenty of rest stops with snacks to keep you energised. You’ll cross the finish line with a wonderful sense of achievement to receive your medal and finishers’ t-shirt.
Push yourself further in 2026 by taking on the Jurassic Coast Ultra Challenge – one of 20 Ultra Challenges across the UK – for Dementia UK, a proud series partner of the Ultra Challenge Series.
Sign up to take part in the Jurassic Coast Ultra Challenge and help us support families facing dementia.
The Ultra Challenge Series is the UK’s number one series of treks and trail runs, offering 20 ‘walk, jog, run’ events in England and Wales, with distances ranging from 5km to 100km. Take on a challenge at your pace as a team or on your own, while raising vital funds and awareness to help families facing dementia.
Whether you’re trekking or running through the city, along a stunning coastline or through magnificent countryside, you’ll get expert support all the way. Whichever challenge and distance you choose, you can expect plenty of food and drink, medical support and massage, great camaraderie, a medal and t-shirt, and an amazing sense of achievement from start to finish.
Push yourself further in 2026 by taking on an Ultra Challenge for Dementia UK, a proud series partner of the Ultra Challenge Series.
Distance options vary according to each Ultra Challenge. Typical distance options are 10km, 25km, 50km, 75km and 100km. View our dedicated Ultra Challenge calendar for the details for each challenge and to sign up for your chosen event and distance.
Full sponsorship for charity: pay the event organiser a small registration fee and fundraise a minimum amount for Dementia UK, and we’ll then pay for your place. The minimum fundraising amount depends on which distance you choose. 50% of your minimum fundraising pledge must be raised and received by Dementia UK by your fundraising deadline, usually three weeks prior to your event.
Mixed funding for charity: pay the event organiser half the cost of your place and fundraise a smaller minimum amount for Dementia UK, and we’ll pay the remaining cost of your place. The minimum fundraising amount depends on which distance you choose. 50% of your minimum fundraising pledge must be raised and received by Dementia UK by your fundraising deadline, usually three weeks prior to your event.
Own place charity fundraising: pay the event organiser for your place in full, then raise as much as you can for Dementia UK with no minimum target.
For full details of funding types, costs and minimum fundraising, view the ‘Costs and fundraising’ options on your chosen Ultra Challenge event page.
The Ultra Challenge Team has a useful help centre page that covers a lot of frequently asked questions. If you have any specific event questions or your question is not covered in the FAQs, please contact the Ultra Challenge Team at info@ultrachallenge.com or on 020 7609 6695 (Monday-Friday, 9am-5pm).

Right now, nearly one million people are living with dementia in the UK. Too often, families struggle to find support, leaving them feeling exhausted, overwhelmed and alone.
When you support our charity, you’re helping us grow the number of dementia specialist Admiral Nurses, who provide life-changing support for the whole family. With your help, no one will face dementia alone.
Read Will and his mum Ronnie’s story about how Ronnie’s diagnosis of Alzheimer’s disease has impacted their lives, and how Admiral Nurses are providing them both with a lifeline.
As part of Team Dementia UK, you will receive:
If you need any support or have any questions about fundraising for Dementia UK by taking on an Ultra Challenge, contact our Challenge Events Team at events@dementiauk.org
Every penny you raise will help our dementia specialist Admiral Nurses provide a lifeline to more families facing dementia – and we’re here to support you every step of the way.
Challenge events welcome pack
Take a look at our challenge events welcome pack online or contact our team at events@dementiauk.org to order a printed copy. It contains lots of handy information about Dementia UK and fundraising for our charity, including motivational fundraising ideas and stories from other challenge event supporters.
Fundraising ideas
Organising fundraising activities alongside your main challenge will help you smash your goal. Here are some ideas:
JustGiving
Setting up a JustGiving page is a great way to fundraise online. Share your link with family, friends and colleagues, and watch the donations roll in.
You can use JustGiving to explain why you’re taking on your challenge for Dementia UK, keep track of how much you’ve raised, and even share your training progress using Strava so your supporters can see how well you’re doing. The event organisers have set up official events on JustGiving so make sure you connect to the right event on your page.
The more you update and share your JustGiving page, the more donations you’ll receive.
Gift Aid
If your supporters are UK taxpayers and their donation is voluntary (not proceeds of a sale), we can claim an extra 25p for every £1 donated – at no extra cost to them. Make sure they fill in the Gift Aid form in your fundraising pack or tick the correct boxes if they’re donating online.
If you’re fundraising through JustGiving, the donations will automatically come to us. If you’ve got cash to pay in, you can do this online, by phone, by bank transfer or by post.
How you can pay in your fundraising money
Every penny you raise will make a huge difference to families facing dementia. Each donation, no matter how big or small, will help you reach your target. Did you know that someone simply donating £4 to your fundraiser could pay for the telephone costs of one family calling our free Helpline for immediate support.
to run a full day of face-to-face appointments for families affected by young onset dementia (where symptoms develop under the age of 65).
to answer calls on our Helpline on a Sunday, when other dementia services are closed.
for a whole week to support a community where people are struggling to access local dementia services.
– Tasha, who took on the Jurassic Coast Ultra Challenge in a team of three“I walked the first quarter 25km challenge with some friends – we kept each other going throughout the hilly terrain with a lot of singing and chats. We lost the plot in the last 5km, but we wouldn’t give up! What a joy to walk for Dementia UK.”
24th January - 25th January 2026
A great event to walk off the Christmas celebrations, and to kick start your New Year fitness regime! Join our London Winter Walk.
1st February - 28th February 2026
Take on 1K every day this February and raise funds to support families facing dementia.
1st March - 31st December 2026
We have partnered with Run For Charity to help you find the perfect challenge. With events across the UK and throughout the year, there’s always a challenge for you.