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Grim Reaper Ultra Marathon

Bourne, United Kingdom • 23-24 May 2026

The Grim Reaper Ultra Marathon is held at the scenic Grimsthorpe Castle Estate in South Lincolnshire. Scheduled for May 23-24, 2026, the event offers solo race distances of 10, 40, 70, and 100 miles, plus a 100-mile team relay. The course features a 10-mile loop combining grass trails through ancient woodland, limestone tracks, quiet estate roads, and a disused Victorian railway line, with an elevation gain of 550 feet per lap.

The terrain is undulating but without major hills, making it suitable for ultra-running beginners and experienced runners alike. Facilities include aid stations, on-site medics, camping near the start/finish, and a supportive atmosphere. Trail shoes are recommended. Visit the organization's website for the most recent information.

United Kingdom East Midlands (England) Bourne

Race information

Website
UTMB 50K UTMB 100K UTMB 100M
100 mi
100 Miles
100 mi
100-Mile Team Relay
70 mi
70 Miles
40 mi
40 Miles
10 mi
10 Miles (day Race)
10 mi
10 Miles (night Race)
Visit the organization's website for the most recent information.
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