Tough Mudder - World's Toughest Mudder
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World’s Toughest Mudder, June 27 and 28 2026
World’s Toughest Mudder is a 24 hour obstacle course event held at Belvoir Castle in Grantham, Lincolnshire, UK on June 27 and 28 2026. The format consists of repeated 5-mile loops over varied terrain that include climbs and a rotating set of obstacles. Examples of named obstacles listed for the event include Arctic Enema (a 34 degree ice pit), Everest (a greased 13 foot quarterpipe) and Kiss of Mud (barbed wire set 14 inches above ground).
Event options for attendees include individual entries, four person team relays, pit crew or spectator passes, and a post event brunch. Ticketed prices shown begin from $490 for individual and team relay entries, $35 for pit crew or spectator access, and $50 for the brunch. The pit area includes reserved campsites, food trucks, music, event announcers, and a race center.
Participants receive an event bib and finisher headband; a finisher shirt and medals are noted for top performers and qualified Contenders. Prizes are awarded for qualified Contenders. The event references an Adaptive Athlete Programme that pairs athletes with course guides. World’s Toughest Mudder is presented by Tough Mudder as part of its Endurance Series, with a Holy Grail recognition tied to completing series events. Visit the organization's website for the most recent information.
