NASS has suspended all branch activity until further notice due to the current COVID19 outbreak. Please follow the link from our homepage for more information.

25km/50km/100km Walks and Treks


The fantastic folk at Action Challenge organise some incredible walking challenges across the UK each year. These challenges have a 25km, 50km and 100km option, so you can choose the place, and set the perfect challenge for you.

With these challenges, you can either pay the full regisration fee yourself, and then choose to raise any amount of money for NASS, or you can choose an option with a smaller registration fee, and a minimum sponsorship target to raise for NASS. Choose the best way for you, and we’ll be delighted to have you on Team NASS and will support you in every way we can!

Take a look at some of the options below and get in touch with us at once you’ve found the one for you!

Due to the Covid-19/Coronavirus pandemic, the following challenges have been rescheduled:

Isle of Wight Challenge: 5/6 September 2020

Jurassic Coast Challenge: 19/20 September 2020

London 2 Brighton Challenge: CANCELLED 

Other events are currently unaffected and reviewed on a 7-8 week rolling time-line as developments unfold. We suggest all our trekers follow Ultra Challenge on their social media platforms to keep updated with any announcements or changes, and we urge you to continue to follow government guidelines around outdoor exercise whilst training. You can get in touch with us at if you have any questions.

Check out these options...

or maybe one of these...