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Grim Reaper Ultra Marathon

Bourne, United Kingdom • 24-25 May 2025

The Grim Reaper Ultra Marathon is a multi-distance trail running event held at the scenic Grimsthorpe Castle Estate in South Lincolnshire, UK. Scheduled for May 24-25, 2025, it offers solo race options of 10, 40, 70, and 100 miles, plus 40-mile and 100-mile team relays. 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 an elevation gain of about 550 feet per lap. Runners can camp onsite for free, and aid stations provide limited supplies, emphasizing self-sufficiency. The event fosters a friendly atmosphere suitable for all abilities, with trophies awarded to top finishers. 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
550 m+
100 Miles
70 mi
550 m+
70 Miles
40 mi
550 m+
40 Miles
10 mi
550 m+
10 Miles
Visit the organization's website for the most recent information.
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