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, footpaths, and minor roads. The scenic course passes through historic and picturesque locations including Creswell Crags, Welbeck Estate, Clumber Park, and Thoresby Estate, with the 40-mile route featuring the famous Major Oak. The event is fully marked and supported with well-stocked aid stations, making it suitable 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.