Sun 30 Apr 2023 Worthing, West Sussex, UK

Three Forts Challenge | 5 Mile Trail Run

A tough and enduring run, founded in 1976.

  • Sun 30 Apr 2023
Hill Barn Recreation Ground, Worthing

5 Mile Trail Run



All ages

  • 5 miles trail running


Marathon and Half Marathon and NEW for 2023 a 5 Mile Trail race. Known as "The Tough One" the Three Forts Marathon (27.2 miles) includes a total of c. 3450 ft of climb with stiles and rough tracks underfoot. The route runs northwards from Hill Barn to Cissbury Ring, then eastwards towards Coombs then to Botolphs and the River Adur crossing. The route then goes to Devil’s Dyke and back to the River Adur. It continues on the South Downs Way to Chanctonbury Ring, where it swings south-west to Findon Park Farm. It stays on public bridleways to Cissbury Ring and back to Hill Barn. The Marthon has a strict 6 hour time limit. The event is fully supported by our Aid Stations for all of this time. The Half Marathon, with a total climb of c.1450 ft, takes a shorter route to Steyning Bowl and picks up the last part of the Marathon route. The map shows the route in more detail and can be used in conjunction with the appropriate OS map. The NEW event for 2023 is a 5 Mile Trail Run for those wanting a shorter distance but with the challenge of the hills.

This event is part of Three Forts Challenge.

Event details

  • All fitness levels
  • Event village
  • Families
  • Newcomers


  • Changing facilities
  • Showers
  • Toilets


  • First aid
  • Marshals
  • No headphones

What's included

  • Cake
  • Chip timing
  • Medal
  • Technical t-shirt


  • All ages
  • Entries open
  • Enter online
Enter now

Other races at event

  • Sun 30 Apr
  • #2 of 3
Hill Barn Recreation Ground, Worthing

Half Marathon



Age 18 & over

  • 13.1 miles multi terrain running
  • Sun 30 Apr
  • #3 of 3
Hill Barn Recreation Ground, Worthing




Age 18 & over

  • 26.2 miles multi terrain running