Gladiator Rock N Run, Pasadena

Presented in part by Dan Clark, also known as Nitro, of American Gladiator fame, the Gladiator Rock'n Run—voted the number-one mud run in the USA by MudRunGuide.com—is a unique and challenging event, pairing an obstacle-heavy running course with post-race entertainment, including beer (not free) , music, and food. Those prepared to race must dance through tires, army-crawl through mud, and clamber up rope ladders to avoid barrels thrown by giant apes. The roar of spectators rings throughout the course as bystanders cheer on runners to inspire strong finishes.