Mountainside Fitness, founded in Arizona, is the largest locally owned health club chain in the state. The company’s core mission is to provide a comprehensive and community-focused fitness experience. With over 10 fitness centers and plans for further expansion, Mountainside Fitness offers a wide range of amenities including interactive childcare programming, kid's fitness equipment, and personal TVs with iPod docking stations on cardio machines. Members can also participate in 80 group fitness classes per week, all included in the membership.

Notable figures affiliated with Mountainside Fitness include its founder and key investors who have supported its growth within Arizona. The company has achieved significant milestones, such as becoming the largest local health club chain in the state and maintaining a strong community presence through charitable initiatives. Mountainside Fitness has made a substantial impact by providing state-of-the-art facilities and fostering a supportive environment for fitness enthusiasts of all ages.