Tough Mudder - World's Toughest Mudder

World's Toughest Mudder, held June 28-29, 2025, at Belvoir Castle in Grantham, Lincolnshire, UK, is a grueling 24-hour obstacle course challenge. Participants face a demanding course featuring the "Hills of Belvoir," with a 200m elevation gain per lap, and obstacles like Electroshock Therapy, Cry Baby, and Cage Crawl. The event offers individual and 4-person team relay formats, with prize money for top finishers.

The atmosphere includes reserved campsites, food trucks, music, and a race center, creating a vibrant all-night experience. Finishers earn medals, finisher headbands, and shirts, marking their achievement in this ultimate endurance test. Visit the organization's website for the most recent information.