Hayes gym is a two-level gymnasium first built in 1910. It is now incorporated into the larger Arvin Cadet Physical Development Center. The gym's first floor underwent extensive renovation during recent rebuild of the overall Arvin gym complex, while the "main room" of the gym received new ventilation and roofing. The first floor the houses two large rooms that are currently utilized as the "Class of 1962 Fitness Center", which is bisected by the "Class of 1957 Hallway". The west wall of Hayes gym was torn down and reconstructed to mesh with the new Arvin gym renovation, which opened in August 2004.
