2027 Three Forts Marathon - May 2

A genuinely hard, hilly off-road course of roughly 27.2 miles - about a mile longer than a standard marathon - with around 3,450ft (1,050m) of total climb. The route crosses three Iron-Age hill forts, Cissbury Ring, Chanctonbury Ring and the Devil's Dyke area, over chalk tracks, grass and rough bridleway with stiles. Expect to finish well outside your road-marathon time. +1050m elevation