Summer Nuts Challenge

The Nuts Challenge : Summer Nuts (29 August 2026)

The Nuts Challenge is a mud and obstacle event held near Dorking in Surrey, close to London. The Summer Nuts edition is scheduled for 29 August 2026 and welcomes fun runners, teams, charities and corporate groups. The organiser operates a permanent assault course on natural terrain and runs events year round.

The course contains a large number of natural and man made obstacles, including mud trenches, water obstacles, walls, cargo nets, tunnels, crawling and climbing sections, and trail running between features. The site is maintained as a single, permanent course and the layout is updated regularly so returning participants can expect new arrangements of obstacles. Multiple laps are an option on some race formats.

Distances offered include:

• 5K race option
• 10K race option

The event also references a challenge scale called the Nuttie Scale to indicate levels of difficulty. The format allows solo entries, team entries and entries for charity or corporate days. Risk assessments and health and safety documentation are prepared for the venue. Visit the organization's website for the most recent information.