Summer Nuts Challenge
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The Nuts Challenge
The Nuts Challenge is an obstacle mud run held near Dorking in Surrey, close to London. The event takes place on a permanent assault course that is operated year-round and updated annually. A Winter Nuts event is listed for Saturday 7 March 2026. The event accepts solo entrants, teams, charity groups and corporate groups.
Course and event format
The course combines trail running with natural and man-made obstacles. The organiser states the course includes over 100 obstacles and features mud trenches, water obstacles, walls, cargo nets, tunnels, crawling, climbing and sections of wading through mud and water. The site is described as an army-style assault course and also hosts other outdoor activities on the same site.
Distances and format options:
- 5 km
- 10 km
- Multiple laps on the same course
Additional event details mentioned include a free race vest or T-shirt for entrants and a free key drop facility. The event is presented as an all-weather, permanently sited obstacle course rather than a temporary pop-up event. Visit the organization's website for the most recent information.
