Dukeries 30 / 40
Ollerton, United Kingdom • 9 May 2026
The Dukeries 30 / 40 is an annual trail running event held in Nottinghamshire, starting and finishing at Walesby Sports & Social Club near Sherwood Forest. It offers two distances: 30.8 and 40.8 miles, both following a clockwise circular route mainly on forest trails, footpaths, and minor roads. The course passes through scenic and historic locations including Creswell Crags, Welbeck Estate, Clumber Park, Thoresby Estate, and for the 40-mile race, the famous Major Oak.
The event features well-marked trails, multiple aid stations, and a 10.5-hour cut-off time. It is designed for both newcomers to trail running and experienced ultra runners seeking a personal best. Walkers are not permitted. Visit the organization's website for the most recent information.