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. Offering two distances—30.8 and 40.8 miles—the race follows a clockwise circular route mainly on forest trails and footpaths. The scenic course passes through historic sandstone villages, Creswell Crags, Welbeck Estate, Clumber Park, and Thoresby Estate, with the 40-mile route including a visit to 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.