Exquisite custom home in prestigious Rio Vista! Elevate your lifestyle with breathtaking Ramapo Mountain views from this John Avanzato-built masterpiece. Enter via a dramatic two-story marble foyer that sets the tone for elegant interiors. Entertain in the expansive dining room with butler's pantry, or cook in the gourmet kitchen with custom cabinetry, granite counters, and a sunlit breakfast area surrounded by glass. The soaring two-story family room with a stately fireplace opens to an oversized deck, ideal for indoor-outdoor living. A richly appointed office/library offers custom built-ins and inspiring views.The first-floor master suite features a cathedral ceiling, large walk-in closet, deck access, and a spa-inspired bath with jetted tub, oversized shower, and double vanity. Upstairs, find spacious bedrooms, Jack & Jill bath, guest suite, and a bonus area above the three-car garage, perfect for a studio or gym.Nestled on 466 acres of rolling hills, Rio Vista offers unmatched amenities: a historic clubhouse, fitness center with saunas, four tennis courts, two pickleball courts, basketball, playground, outdoor pool, heated spa, and formal gardens. Surrounded by parks and reservation land, enjoy hiking, fishing, snow sports, and more, just minutes from NYC. Discover Mahwah's finest luxury living in this extraordinary home, schedule your private tour today!