Skylands Ninja Warrior is a unique training gym in Sussex County that offers classes and camps that provide both kids and adults with a challenging and fun way to build physical strength and mental toughness. Filled with obstacles that rival those found on the hit show, American Ninja Warrior, and staffed by elite athletes who’ve competed in ninja warrior competitions across the country, Skylands Ninja Warrior is not your typical gym. No treadmills or weight machines here. Instead, we’ve got the Devil’s Steps, the Warped Wall, and Cannonball Alley, with programs specially tailored to challenge you, no matter your age or current fitness level.