Trail Running calendar near Boughton-under-Blean 2026-2027

Four point-to-point races across the South Downs National Park on runnable, non-technical trails that converge to cross Beachy Head and finish in Eastbourne; the **100k** race is part of the South Downs Triple Crown.

Trail challenges from Richmond upon Thames to Brighton on 23 to 24 May 2026. Distances include 100 km, 50 km, 25 km and a Sussex Trail Marathon with rest stops, GPS tracking, catering and medical support.

A 5k obstacle course at Royal Windsor Racecourse with mud obstacles to climb, crawl and slide, mixed tarmac and grass surfaces, staggered wave starts and a minimum age of 13. Earlybird entry prices and a fundraising target apply.

A 100K ultramarathon in the Chiltern Hills on an anticlockwise loop from Chesham, passing Ashridge Estate, The Ridgeway and Whiteleaf Hill, with marked route, open GPS tracking, aid stations and a 19 hour time limit.