Silverbacktrails - Oswiu's Revenge
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Event overview
SilverBackTrails Oswiu’s Revenge - Half Marathon is a trail running event on Sunday 17 May 2026. The route is approximately 13.2 miles and runs around the Black Hambleton and Silton Woods area, south of Osmotherley. The event is organised by SilverBack Trails and entry is limited to 50 participants. Minimum age is 18. Entries are handled through SiEntries only; there are no entries on the day. The entry fee is £20.00. Each finisher will receive a bespoke medal and a certificate. A time limit of 3.5 hours applies.
Course and logistics
The course follows forest tracks and ancient trods and includes varied terrain with technical ascents and descents. There will be some flags and marshals to assist navigation. A master map will be available at registration and a GPX file will be sent to participants before the event. One checkpoint on the course and the finish will offer water, coke and sweets or snacks, with provisions suitable for vegetarians and vegans. There is ample parking at the start/finish at Square Corner, near Osmotherley; a £1 per car charge will be collected and donated to the National Park. Canine running partners are allowed on a short lead or harness; the event applies an adjusted time limit for dog-powered entries. Mandatory minimum kit includes a waterproof jacket with taped seams (unless Paramo), hat and gloves, spare thermal top, emergency bivvy bag, 500 ml of fluid, at least 60 g of food, a fully charged mobile with What3words and OS Maps or OS Locate, a working compass, and an OL 26 or Harvey’s map of the North Yorkshire Moors. Visit the organization's website for the most recent information.