Valley and Arizona based Mountainside Fitness was founded on one simple idea: to be the friendliest fitness center in town.

Arizona’s largest locally owned fitness center is expanding and opening four new locations in Paradise Valley, Avondale, Eastmark in Mesa and Estrella Mountain (Goodyear). All are set to be ready for business in 2020, except Estrella Mountain which will open in 2021. More grand opening details will be announced shortly. To get updates and grand opening specials visit

Mountainside Fitness, alongside its renowned service, provides a wide variety of amenities to help its customers achieve their fitness goals. Each location has top-of-the-line equipment, state-of-the-art childcare, full-service locker rooms, and free towel service.

There are also more than 80 group fitness classes to attend like Zumba, cycling with a live DJ, Flow Yoga, Step, HIIT (high-intensity interval training), and many more.

Personal services at the club include personal training, a chiropractor, massages, physical therapy, executive lockers, and Sonora Quest lab tests.

“It’s a big and exciting step to open four new locations, but we couldn’t be happier to be able to serve more people in the Valley. We want people to be happy, fit and grow closer as a community. We continually strive to add more value to our experience!” said Tom Hatten, CEO and founder of Mountainside Fitness.

Mountainside Fitness currently offers affordable memberships at 17 locations throughout the Valley, soon to be 21. For more information visit