As interest in American Ninja Warrior and local ninja competitions have grown, several Ninja Leagues have popped up to bring ninjas a series of competitions in gyms across the country. Check out the major Ninja Leagues below, including National Ninja League (NNL), Rec Ninja League (RNL), Ultimate Ninja Athlete Association (UNAA), Athlete Warrior Games (AWG), Wolfpack Ninjas, Ninja Challenge League, and more – to find results for past events, upcoming competitions, league rules, and more!