Events > 100km in May

100km in May

Walk, jog, run, cycle, or swim your way through 100km in May to support the 90,000 babies needing neonatal care every year in the UK!

About the challenge:

Challenge yourself to complete 2 kilometres a day, or do longer distances less often in your local area - it's totally up to you!

When you register, you'll receive a free Bliss t-shirt and fundraising pack. Plus, if you raise over £150, you’ll receive your very own newly redesigned Bliss medal!

Make a difference this May and fundraise to help Bliss support babies born premature or sick.

Date: Thursday 1st May, 2025 – Saturday 31st May, 2025

Location: Anywhere

Registration fee: None

Fundraising pledge: £150

Registration deadline: Friday 16th May, 2025

Take part

How to join:

Register and set up your fundraising page .
Join our 100km in May Facebook group, where the Bliss Events team and fellow challengers will be supporting and cheering you on throughout May.
Once you've registered and set up your fundraising page, we'll send you your free Bliss t-shirt and fundraising pack in the post.
Not on Facebook? No problem! Simply fill out the registration form and set up a 100km in May JustGiving page or use our sponsorship form if you're raising money offline.

Any questions?

For answers to your questions, you can read our 100km in May frequently asked questions, which should provide you with all the information you need.

Digital resources:

You can find resources in this section to support you through your challenge.

100km in May tracker

Use this tracker to record your daily distance (PDF download)

100km in May sponsorship form

Use this sponsorship form to ask friends, family and colleagues to sponsor you (PDF download)