Resource Ultra Challenge Walk, run, or jog (as a team or individual), with the option of 25km, 50km, 75km or 100km distances. There are even a few ‘taster’ 10km options. Print There are Ultra Challenge endurance races for everyone, you can take it at your own pace. There are 16 different events and all include plenty of food and drink, rest stops and excellent support teams. Join as an individual or as a team. Popular options include their biggest event on the Jurassic Coast, the scenic Lake District and Peak Districts offer some incredible views or perhaps try the flatter Thames Path challenge or Halloween Walk in London. Find out more If you would like to contact the Fundraising team before signing up to a walk or trek please email fundraising@nras.org.uk or call us on 01628 823 524.