Tough Mudder World's Toughest Mudder 26 Jun 2027

World's Toughest Mudder 2027 returns to Belvoir Castle near Grantham in Lincolnshire on 26 and 27 June 2027. It is Tough Mudder's 24-hour championship: once the sun goes down, the estate grounds turn into a full night of up-scaled obstacles, cold water drops and brutal terrain, and participants rack up as many laps as they can before the clock stops.

Unlike a standard Tough Mudder, WTM is a competition. Prizes are on the line for qualified contenders, both overall and by age group, and solo participants can interlock the WTM medal with Infinity and Toughest Mudder medals to complete the series' ultimate endurance set. You do not have to go alone, though: team relay options allow the course to be tackled in teams of 2 to 4 or 5 to 12 people, with team-mates taking turns on the course.

The pit area is the heart of the event, with reserved campsites, food trucks, music, announcers and a race centre, and a post-event brunch is open to participants and pit crew. The organisers report that registration spaces are disappearing rapidly, so register early. WTM suits experienced obstacle racers and ultra-endurance athletes; the relay formats open it to strong teams. Entries are on the official World's Toughest Mudder page.

Tough Mudder World's Toughest Mudder is set for Saturday, 26 June 2027: an outdoor fitness race in World's Toughest Mudder, United Kingdom. Tough Mudder is a team-first obstacle course event: a muddy 5K with 12 or more obstacles or a 15K with 20 or more, built around teamwork rather than finishing times. Signature obstacles include Arctic Enema, Mudderhorn and Electroshock Therapy.

2 divisions are offered at Tough Mudder World's Toughest Mudder: World's Toughest Mudder (Solo) and Tough Mudder (Solo). Entries are on sale and start at $204. Our last availability check was on 19 Oct 2026.

Register on the official Tough Mudder website, where entries are sold per division. Turn on alerts on Race.Fitness to hear about new Tough Mudder dates and price changes.

Other upcoming Tough Mudder dates: Tough Mudder Dubai (31 Oct 2026), Tough Mudder Melbourne (13 Feb 2027), and Tough Mudder Austin (27 Feb 2027). More fitness races in the same country: Deadly Dozen Sheffield (24 Oct 2026), HYROX Birmingham (27 Oct 2026), and HYROX Birmingham (31 Oct 2026).