Congratulations on completing our 13.1 Mile Training Challenge on Strava! Ready to take on your next challenge? Use your 30% discount code to join Team Cancer Research UK to take on one of the UK's best running events.
30% off entry fee discount code: 131MAY
T&Cs apply - please see below for more information
You've already completed your Strava half marathon challenge, why not take on your next 13.1 miles?
Looking to step up your next challenge? Take on a marathon with Cancer Research UK.
Looking for a 5k or 10k event? Sign up to one of our Race for Life events near you.
Date: Sunday 5 October 2025 Terrain: Flat Join us at one of Scotland's biggest running events, right through the very heart of Glasgow.
Date: Sunday 19 April 2026 Terrain: Flat With only 55m of elevation gain, this race is perfect for a personal best.
Date: Saturday 20 September 2025 Terrain: Hilly An adventure like no other, Tough Mudder is more than just an obstacle course.
Date: Sunday 19 October 2025 Terrain: Flat Enjoy 10 miles with inspiring history and glorious sea views.
Date: Sunday 28 September 2025 Terrain: Undulating A single looped course past some of the most iconic buildings in Nottingham.
Date: Sunday 8 March 2026 Terrain: Flat A one lap half marathon route through the spectacular city of Cambridge!
If you've already secured your own place, you can use it to join Team Cancer Research UK and fundraise for our vital work. Make sure you've officially signed up with the event organiser and have paid the entry fee, then there’s no extra cost to join our team.
We are aiming to have over 23,000 amazing supporters take on a partner sports challenge for Cancer Research UK in 2025. If everyone hits their target, we could raise an overall total of around £11.5 million. These vital funds could pay for the Cancer Research UK Manchester Institute for 8 months.
Work at the Cancer Research UK Manchester Institute spans the whole spectrum of cancer research, from programmes investigating the molecular basis of cancer to those focused on developing new treatments.
There are plenty of other ways to play your part and support Cancer Research UK. From donating, to volunteering and fundraising, check out other ways to get involved.
Terms & conditions
1. When you redeem the code 131MAY (“Code”), you are deemed to accept these terms and conditions.
2. The Code is for 30% off the entry fee for any running events taking place in 2025 and 2026 that are listed on Cancer Research UK’s website (cruk.org) and that have places available but excluding the TCS London Marathon.
3. The Code will be redeemable until 11:59pm on 30th June 2025 and can be redeemed on Cancer Research UK’s website (cruk.org) only by adding the Code to the “Enter voucher code” section on the registration page.
4. The Code is available to all residents of the United Kingdom who are aged 18 or over.
5. The Code is non-transferable and cannot be exchanged for cash or used in conjunction with any other promotion.
6. Places at the events are limited and are allocated on first come first serve basis.
7. The Code can only be redeemed once until the time/date stated above.
8. Cancer Research UK welcomes wheelchair users to take on challenges for Cancer Research UK. Please note however that not all events for which the Code can be used will be wheelchair accessible. For Cancer Research UK organised events, please see the relevant event page. For other events, please contact the event provider.
