World's Toughest Mudder participants may compete in one of three categories, based upon the experience they wish to pursue and eligibility for podium prizing.
- CONTENDER: In order to be eligible for podium awards as an individual, including overall podium positions, age group awards, and cash prizes, athletes must be qualified as contenders. Contenders will not be eligible to participate in certain on-course challenges and gamification elements. Athletes meeting Elite Contender criteria will also compete within the Contender category, with the additional benefits of an exclusive bib and priority pit space selection.
- OPEN: All non-contender athletes participating as individuals will be considered part of the Open category and may elect to participate in on-course challenges and gamification elements. Open category participants are not eligible for podium positions, age group awards or cash prizes; however, they are eligible for achievement awards, such as mileage bibs.
- TEAM CATEGORY: Teams of 2-4 people of any age or gender registered in the team category may compete as a team pursuant to the rules outlined in this document. All teams, regardless of size, will be ranked against all other legally competing teams in this category.