About this event

Every day, 12 children are diagnosed with cancer in the UK. That’s 12 children too many.

Challenge yourself to run, or walk, 12 miles over 12 days in May, to raise money for Children with Cancer UK. Together, one step, one mile and one day at a time, we will put an end to childhood cancer.

Register for the event

Location & Date

  • across the UK
  • May 1, 2019 - May 31, 2019

Contact Details


Who can sign up?

Anyone who feels that they can either run or walk 12 miles over 12 days!

Can I enter as a team?

Absolutely! If you would like to complete the challenge as a team, it is really straightforward. You can create a team when you are registering for the challenge and then the people in your team can search for it when they are registered and join your team.

When does the 12/12/12 Challenge happen?

The 12/12/12 Challenge will be happening all through May. You simply pick a start date anytime in May and then complete your challenge over the next 12 days.

How long do I have to fundraise?

Most challengers complete their fundraising two weeks after their 12-mile event, but you have up to a month in total.

What support can I expect from Children with Cancer UK?

  • A bright and colourful running vest to wear throughout the challenge
  • Regular emails with top tips
  • Access to a private Facebook group to connect with other people taking on the 12/12/12 Challenge.
  • A fundraising pack to help you get started
  • A 12/12/12/ playlist to listen to while you walk or run your 12 miles

Where does my money go?

Children with Cancer UK funds vital specialist research into childhood cancer to save the lives of every child with cancer and keep more families together. We also focus on making the experience families have during treatment as comfortable and unintimidating as possible – whether that’s improving paediatric facilities in hospitals or funding precious family days out.

How do I get involved?

Simply click the button below to register. By filling in the form you will register for the challenge and your fundraising page will be automatically set up for you so you’ll be good to go!

Register for the event
Children with Cancer UK @ CwC_UK

💛 Maisie finished cancer treatment in '13. 🙏 Recently, Maisie and her friends have been making and selling friendship bracelets to raise money for us. ⭐ We want to say #ThankYou to Maisie, Hannah, Rosa, Eden & Nirali who ran the stall and raised £75. https://t.co/Mkk8o4JGva https://t.co/jEbvtLt01n

Children with Cancer UK @ CwC_UK

A huge #ThankYou to our #CommunityFundraisers Beccy and Marcus who’s raised £3,930 by walking 106 miles over 6 days on the West Highland Way! They were inspired to take on the trek after their 6 year old nephew Lucas was diagnosed with a #WilmsTumour. Your support means a lot🙏 https://t.co/EJDlxfzGVv

Children with Cancer UK @ CwC_UK

Meet Richard and Izzy-Mae, #CommunityFundraisers from the Midlands. Richard has completed both #LondonMarathon and #RideLondon for us. In September, his daughter Izzy-Mae completed a 100 mile cycling challenge raising over £1,900. A huge #ThankYou!👉 https://t.co/mujaCArCHU https://t.co/msKISiCdSv