Culden Faw is a monster of an estate near Henley-on-Thames covering thousands of acres with plenty of hills, valleys and fields. Only the Toughest Mudders completed this course in 2014, and we expect the same next year. You’ll never be running on the flat, so get used to burning quads and calves for the duration of your run. We’re coming back with new challenges and a few muddy tricks up our sleeves. Get training and get another year tougher.