Iron Fortress is Denver's dedicated calisthenics, streetlifting, powerlifting, and Hyrox gym, operating 24/7 in a warehouse facility. It offers five training disciplines with specialized programming and equipment: a full-size Kenguru Pro calisthenics rig, weighted-calisthenics setup, competition-grade powerlifting racks and platforms, Hyrox-specific stations including rowers and SkiErgs, and endurance programming. The gym suits beginners through competitive athletes across all disciplines.
Iron Fortress offers HYROX-specific classes, so you can train the race's running-plus-stations format with coaching rather than piecing sessions together yourself. For race-specific work, the gym has a sled track, SkiErgs and rowing machines — the kit that matters most for practising sled push and pull efforts at competition standard. Members rate it 5.0 out of 5 across 16 Google reviews.