How it works

How it works


Sign up and set your walk or run goals.

Share & ask your friends to support you

Tell everyone that you’re leaving your limits behind and get their support for MS research.

Ready, set…go!

Track your kilometres and challenge yourself through May.

A Global Collaboration

There are over 2.8 million people around the world living with MS and in every country, life is different. At the MS International Federation, it’s our mission to leave MS where it belongs, behind us. 

The UK MS Society, MS Society of Ireland, The MS Society of Canada, Stichting MS Research (Netherlands) and Esclerosis Múltiple Argentina are leaders in the MS International Federation. Together we have committed to increase funding for vital MS research worldwide, and improve access to effective treatment for everyone – no matter where they live. The May 50K is one of the most important ways we can help achieve those goals, so the only thing we leave behind us is our limits.

Without working together the world could miss out on international collaborations that can speed up research and reduce duplication of effort. Be part of a faster, more connected world of research!

Without working together there would be nobody taking the fight for access to affordable treatments to the global level. We are stronger when we all run together!

The MS International Federation is the global body for national MS organisations and will be leading the event in the US, with the endorsement of its member, The National Multiple Sclerosis Society.

You can find out how the money is split and what it funds on each countries dedicated sites: Ireland, Netherlands and the UK.

How to link your fundraising page to your fitness tracker


Download the FitBit, Strava or MapMyFitness app and set up your account


Log in to your The May 50K account and select ‘Log My Fitness Activity


Chose your favourite app and connect your account

For more detailed instructions on how to connect to your fitness app, please click here.

Are you ready to join The May 50K and leave your limits behind?