Starting from Guildford, this challenge takes you through the beautiful Surrey Hills and surrounding countryside on a scenic looped route. Whether you’re looking for a new challenge or ready to push yourself further, you can walk, jog or run a 50km loop, with 25km and 10-mile options also available. With support and refreshments along the way, you can take it on at your own pace.

As Breast Cancer Now is an official charity partner, you can register for just £10 when you sign up to support us at the North Downs 50 Ultra Challenge. Simply use code BCNDEAL10 when registering. This offer is available until 30 November 2026 and excludes the 10-mile distance.

What you'll get

• Inclusive and fun event with a great atmosphere and camaraderie

• A fully signed route, with a team of ‘Trekmasters’ out on the trail with you

• Regular covered rest stops, with free food and drink, massages and medics

• An epic finish line moment, with a glass of fizz, medal and t-shirt

• Camping, transfer and parking options to make getting there and away easy

• Full fundraising support, and a choice of fundraising options