Mountainside Fitness

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9745 W Happy Valley Rd Peoria, AZ 85383


As a 23-year-old junior, Tom Hatten didn’t spend his evenings at the raucous parties or ice-cream socials associated with college life. Instead, he’d spend the waning hours of his evenings waiting by the dryer for the last batch of towels before collapsing into bed. In the morning, he would lug them to Mountainside Fitness, the gym he opened as a student that he has thrown all his energy into maintaining ever since.

Today, the humble 4,800-square-foot space has bloomed into nine gyms that average a sweeping 41,000 square feet. Tom’s vision of creating a friendly neighborhood gym that greets each guest with a warm towel underscores every decision he makes for the different locations, from the colorful kid-care spaces to the entertaining group fitness classes. Personal trainers plan regimens tailored to each client, helping them lose weight, build muscle, or target the muscles that will help build a better golf game. Clients can create their own routines with the help of cardio and weight machines, or explore the different amenities at each location, such as saunas, rock-climbing walls, and indoor basketball courts.


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