Las Vegas Cyclery, Las Vegas

The Wild Thing Triathlon is a little different from your typical three-sport endurance race. For one, it's designed for both and kids to complete. That's why it boasts two courses: a longer one and a scaled-down shorter one accessible to kids age 3 and older. Another creative touch? It progresses backwards—running comes first, followed by biking, then a current-assisted swim in Wet 'n' Wild water park's lazy river. For an extra dose of kid-friendliness, contestants who prefer not to swim can wade too, although sending a stunt double down the river is not allowed.