The countdown is on
Sunday 2nd May 2027 · The South Downs, Sussex
Race day is here — good luck, runners!
More than a run. A challenge with heart.
The Three Forts Challenge is a much-loved Sussex running event that has been bringing people together since 1977. Known affectionately as “The Tough One”, our marathon, half marathon and 5-mile trail run take runners through the spectacular South Downs, combining challenging hills, breathtaking views and a wonderful sense of achievement.
What makes the Three Forts Challenge truly special is the community behind it. We believe in inclusion, encouragement, friendship and supporting the community around us – values that can be felt from the moment you arrive to the moment you cross the finish line.
We’re also proud to be a dog-friendly running event, welcoming runners who want to take on the challenge alongside their four-legged running companions.
Runners, volunteers, supporters and local organisations all play their part in creating the friendly and welcoming atmosphere that makes the Three Forts Challenge so special. All profits from the event support Ferring Country Centre and other local charities, helping our event make a positive difference beyond the finish line.
Whether you’re chasing a personal best, taking on your first trail challenge, running with friends or sharing the experience with your dog, you’ll be part of something bigger – a community brought together by challenge, camaraderie and a shared love of the South Downs.
Run with heart. Run the hills. Run for charity. Run with the Three Forts.
Run the hills. Earn the views.
Every climb on the Three Forts Challenge pays you back with some of the finest views in Sussex — rolling chalk downland, open skies and the coast glinting in the distance.
It’s tough, it’s beautiful, and the finish-line feeling is like nothing else.
Why Three Forts Challenge
A Challenge to Be Proud Of
Known as “The Tough One”, our routes offer a rewarding challenge for every runner, with unforgettable trails, testing hills and an incredible finish-line feeling.
Experience the South Downs
Run through the spectacular South Downs, surrounded by beautiful countryside, sweeping views and some of Sussex’s most memorable and inspiring trails.
Community at Our Heart
Expect a warm welcome, friendly encouragement and fantastic support from our volunteers, bringing runners, supporters, families – and four-legged companions – together.
Run and Make a Difference
Your run means even more, with all profits supporting Ferring Country Centre and other local charities, creating a positive impact beyond the finish line.
What our runners say
“ The views are worth the climbs. ”
“ A first ever half for me, but what a great one to pick – challenging but rewarding. ”
“ Tough hills, stunning views, and a community atmosphere that makes every mile feel worthwhile. ”
#ThreeFortsChallenge
Hills, views, mud and medals — moments from the South Downs.
Join us as a volunteer
The Three Forts Challenge runs on community spirit, and our volunteers are at the heart of it. From marshalling on the hills to handing out medals at the finish, you’ll be part of the day that makes it all possible.
No experience needed — just bring your enthusiasm and we’ll take care of the rest.