Ming-Yi L.
8/17/2025
I am so glad that they have the M'kid program which allow me and my wife to have chance to rest and workout!
Mountainside Fitness Happy Valley
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9745 W Happy Valley Rd
Peoria, AZ 85383
Mountainside Fitness is Arizona's largest locally owned fitness center chain, offering 21 locations throughout the Greater Phoenix area. Renowned for its state-of-the-art amenities, the company provides a comprehensive fitness experience that includes innovative group classes, personal training, and engaging childcare services.
In addition to extensive fitness offerings, Mountainside Fitness emphasizes outstanding member service and community involvement. With a commitment to supporting health and wellness journeys, the organization aims to be more than just a gym, positioning itself as an all-inclusive fitness destination.
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Reviews
3.5262 reviewsCody S.
9/4/2025
Gym is updated and locker rooms are best I've seen in for a while Staff is all nice and helpful. The Saunas are huge plus
Emily F.
6/9/2025
Great gym . Kids enjoy coming too. The classes are great, and recovery massage chairs/steam room is nice too.
Sarah W.
6/28/2024
This is my favorite Mountainside location! The staff is friendly and the facility is clean. They always have clean towels and antibacterial wipes available. However, because it's a great...
Jamie S.
9/3/2025
Mountainside has a lot to offer! The facility and daycare is clean, they have amazing hours, and is better than any other gyms we have ever been to! I wish they had them in other states!
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