Tough Mudder Midlands 2026

Tough Mudder Midlands 2026 is an official amateur OCR participation event at Belvoir Castle in the English Midlands on 4 to 5 July 2026. The official Tough Mudder event page confirms open registration for 20+ obstacle and 12+ obstacle formats across both days, plus Kids Adventure races, and describes Belvoir Castle as one of the most technically difficult and muddy courses on the 2026 calendar.