Mountainside Fitness Is Coming to Oro Valley, Marana, and Vail: Arizona's Largest Locally Owned Gym Just Picked Its First Three Tucson Sites

Arizona's largest locally owned fitness brand is making its first move into southern Arizona, and it is making it three sites at a time. Per Mountainside Fitness's company announcements, Real Estate Daily News, Connect CRE, and Greater Phoenix In Business Magazine, the Scottsdale-headquartered chain will open three new clubs in the Tucson metro in 2026 — a 45,000-square-foot adaptive reuse of the former Ashley Furniture building at the Oro Valley Marketplace at Oracle and Tangerine, a 40,000-square-foot ground-up standalone at the Houghton Towne Center at Old Vail and Houghton Road in Vail, and a 40,000-square-foot ground-up standalone inside Bourn Companies' planned Cascada retail center at the northeast corner of Twin Peaks Road and Interstate 10 in Marana. Each project is in the $11 million to $12 million range for roughly $33 million across the three sites, all three are scheduled to open mid-to-late 2026, and the company has publicly flagged a potential fourth Tucson-area location. Here is a fully sourced May 15, 2026 walk-through for Oro Valley, Marana, and southeast Tucson residents tracking what is actually being built — and for relocation buyers comparing Tucson's day-to-day amenity map against other Sun Belt destinations.