Dukeries 30 / 40

MAY
8
2027
Circular trail ultramarathon in Sherwood Forest offering supported 30.8 and 40.8 mile one-lap routes with marshals, refreshments and a 10.5 hour cutoff.
41 miles 31 miles

Always double-check with the organizer's website! This page may contain affiliate links.

Dukeries 30 / 40

The event is a circular trail ultramarathon in and around Sherwood Forest, held as a single lap taking runners through forest trails, footpaths and farmland. The route passes Creswell Crags, the Welbeck Estate, Clumber Park, Thoresby Estate and several sandstone villages; the 40.8 mile route also passes the Major Oak.

All races are fully marked and marshalled, and no navigation beyond common sense is required. Basic refreshments are provided at regular intervals and at the finish. All finishers receive a medal unless they opt out. Dogs and canicross are welcome, with a maximum of 20 canicross runners on the event. Pacers and drop bags are not permitted. The event closes when full and operates a waiting list.

Practical details given by the organiser include a minimum age of 20, a generous overall cutoff time of 10.5 hours, and the stated one-lap distances. The start, registration and finish are at Forest Lane, Walesby, Newark, Nottinghamshire NG22 9PF. Final instructions and latest information are issued by the organiser before the event.

Distances: Visit the organization's website for the most recent information.

  • 30.8 miles one-lap loop
  • 40.8 miles one-lap loop
41 mi
Dukeries 40
31 mi
Dukeries 30

Events nearby

A last person standing Backyard Ultra at Hardwick Hall Estate with repeated 4.16 mile loops through trails and farmland until only one runner remains.
A 100 mile ultra on runnable trails through Sherwood Forest and towpaths, with two forest loops, well stocked aid stations, a 30 hour cutoff, drop bag points and pacers allowed from about mile 51.
A six-hour looped running challenge in Sherwood Pines where runners complete as many laps as they wish and all finishers receive a bespoke medal.
A new 12 miles trail race in Clumber Park on 26 September 2026 with a marshalled route, water stations, finisher medals and a three hour cut off.
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