Grim Reaper Running Festival

The Grim Reaper Running Festival 2026 takes place at the scenic Grimsthorpe Castle Estate in South Lincolnshire. Scheduled for May 23-24, the event offers multiple race distances: solo 10, 40, 70, and 100 miles, plus a 100-mile team relay. The course features a fully marked 10-mile loop combining grass trails through ancient woodland, limestone tracks, quiet estate roads, and a disused Victorian railway line, with views around the estate lake and the castle.

The terrain is undulating but without major hills, suitable for ultra-running beginners and experienced runners alike. Aid stations are limited, encouraging self-sufficiency, and camping is available onsite. The festival promotes a friendly atmosphere with trophies awarded across categories. Visit the organization's website for the most recent information.