About the event
For those looking to step beyond the marathon, the Grim Reaper 40-Mile Ultra delivers a scenic yet demanding challenge, covering four loops of the estate’s 10-mile trail. With 671 meters of total climbing, the race requires careful pacing as runners navigate estate roads, forested tracks, and sections of rolling elevation. Bog Dog Running ensures top-tier race organization, including strategic aid stations, medical support, and enthusiastic volunteers. Whether tackling your first ultra or pushing for a competitive finish, this 40-mile race offers an unforgettable endurance experience in the heart of Lincolnshire.
Date:
Sat
May 24
2025
Location:
Distance:
Elevation profile:
Moderate
Website:
LinkElevation gain:
Number of participants:
Other distances for this race
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
Take your running to the next level
The Grim Reaper 40-Mile Ultra, set for May 24, 2025, presents a tough yet rewarding challenge, with 671 meters of elevation gain spread across four laps of the castle estate’s rugged trails. Hosted by Bog Dog Running, this race is a perfect entry point into ultra-distance running, offering a blend of endurance, pacing strategy, and breathtaking scenery.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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