Mountainside Fitness is your premier fitness center in Peoria, serving Peoria, Glendale, Phoenix, and Surprise with state-of-the-art facilities and affordable gym membership options. Our fitness club features top-tier equipment, group fitness classes, personal training, yoga, Pilates, and unique amenities including Cold Plunge, Red Light, Infrared Sauna, HYROX, and Green Turf. Whether you're into high-intensity workout classes or prefer pickleball and basketball, we have everything you need to reach your fitness goals. Join thousands of members who've made Mountainside Fitness their health club of choice. Visit us today for a tour and discover why we're the best fitness destination in the area.