Trailtrekker is a 100km trek for teams of four, over 30 hours (yes, that's day and night!) across the Yorkshire Dales National Park. Around 300 teams take part in the event each year, all raising money to help people in poverty.
The route is challenging, and it requires great determination and teamwork. But in return, you'll get a fantastic sense of achievement and the money you raise will make a real difference.