Why users love this gym? Ninja Nation is the leading provider of world class obstacle course arenas across the country, serving America’s youth and adults with the most exciting facilities for developing skills, strength and confidence. We love the sports of Ninja Warrior and Obstacle Course Racing and What can I expect to achieve by attending this gym? Ninja Nation is the leading provider of world-class obstacle course arenas and experiences across the country. Our goal is to create over one million heroes. That’s one million kids and adults pushing their minds and bodies to limits they never thought possible. Play, Train and