The Lion's Den is an American mixed martial arts team and training facility that was based out of Lodi, California and San Diego, California but has recently moved its headquarters to Reno, Nevada. The team was founded in the early 1990s by UFC Hall of Famer Ken Shamrock, and was the most dominant fight camp in the early UFC. It featured fighters such as Frank Shamrock, Guy Mezger, Vernon "Tiger" White, Jerry Bohlander, Tra Telligman, Pete Williams, and Mikey Burnett. The Lion's Den now features many new training facilities, including Lion's Den Arizona, Lion's Den Connecticut, and Lion's Den Reno.