A former Sport Chalet store near Interstate 17 and Happy Valley Road in far north Phoenix is getting a new tenant. Scottsdale-based Mountainside Fitness is taking over the space and will open its 15th location there in the north Valley. The space is at Happy Valley Towne Center. The Happy Valley Towne Center is part of Vestar's real estate portfolio. Vestar also owns Desert Ridge Marketplace and Tempe Marketplace. Mountainside opened its 14th location at State Farm's Marina Heights development...