Grim Reaper Ultra Marathon

The Grim Reaper Ultra Marathon is set to take place at the picturesque Grimsthorpe Castle Estate in South Lincolnshire on May 24 and 25, 2025. Participants can choose from four solo distances: 10, 40, 70, and 100 miles, as well as team relay options for the 40 and 100-mile distances. The event features a scenic 10-mile loop that includes grass trails, limestone tracks, and quiet estate roads, making it suitable for both seasoned ultra-runners and newcomers.

Runners are encouraged to camp on-site, and various amenities, including food and aid stations, will be available throughout the event. Visit the organization's website for the most recent information.