15608 Mary St Perched on a private, gated 10+/- acre estate at the end of the road and backing to the Balcones Canyonlands Preserve, this exceptional property offers sweeping views of Lake Travis and the surrounding Hill Country with rare privacy just minutes from lake access. The thoughtfully designed compound includes a 4, 744+/- sq ft custom main residence, a 2, 600+/- sq ft guest house, and premier equestrian facilities, all oriented to capture the protected natural landscape that will remain forever wild. The main residence features dramatic two-story windows, multiple indoor and outdoor living areas, a two-sided stone fireplace, and expansive covered and uncovered patios with an outdoor kitchen and fireplace, ideal for entertaining and sunset views. The primary suite offers a spa-like bath with copper sinks, soaking tub, walk-in shower, and custom closet. A chef's kitchen with a Bertazzoni range, custom cabinetry, butler's pantry, office, media room, and additional living spaces complete the home. The guest house includes a private courtyard with cooking center, flexible bedroom and office spaces, porcelain tile floors, and an upstairs apartment with private entrance and preserve views. Equestrian amenities include a six-stall barn with smart-controlled water systems, indoor and outdoor wash racks, tack room with bath, and a second-floor one-bedroom apartment with balcony, plus a riding arena and two fenced pastures. Located about 20 minutes from the iconic Pennybacker Bridge, the property offers preserve frontage, approximately one mile of trails, multiple dwellings, and turnkey horse facilities, ideal for a private estate, equestrian operation, or family compound, all while remaining just 10 minutes from the Four Points area and about 30 minutes to downtown Austin.