Introducing an extraordinary opportunity to own one of Tarpon Springs most coveted equestrian estates. Nestled at the convergence of Pinellas, Pasco, and Hillsborough counties, this rare and elegant property seamlessly blends refined luxury with unmatched functionality. Spanning over 6,200 square feet of meticulously crafted living space, the residence boasts 6 bedrooms, 5.5 full bathrooms, and a half bath, including a private 900 square foot guest apartment with its own entrance, bathroom, kitchenette, and tranquil views of the Greek inspired saltwater pool and spa. At the heart of the home lies a gourmet chefs kitchen adorned with Sub Zero appliances, a custom Herbashaw island, multiple coffee bars, and designer custom wood cabinetry. Soaring 12 to 20 foot ceilings, solid 8 ft custom solid wood doors, and Pella windows and doors enhance the homes bright, open feel, while thoughtful touches like motorized chandeliers, custom fireplaces, and tongue and groove ceilings reflect years of intentional design and craftsmanship. The layout includes multiple living spaces, a grand formal dining room, oversized guest bedrooms, gym, a spacious home office, and a dedicated media roommaking this estate ideal for both entertaining and everyday elegance. Two Juliet balconies, a double staircase, and expansive wood, slate, and porcelain tile flooring add to the homes timeless appeal. Outdoors, the estate transforms into a fully operational equestrian haven. The six stall shed row barn, two story tack room, hay room, chicken coop, six rotational pastures, round pen, and stocked pond offer every amenity the discerning equestrian desires. A separate entrance for boarders or trailers ensures functionality without compromising privacy. Perhaps the most compelling feature: this estate sits within riding distance to the Brooker Creek Preserve and just minutes from seven elite equestrian facilities. An ideal location for trainers, riders, or those seeking the ultimate lifestyle property. Additional recent upgrades and features include: 2023 Roof Replacement 2025 New AC Units and Pool Pump Fresh Interior Paint (2025) Exterior Paint (2024) Surround Sound & Camera Surveillance System Outdoor Stone Fireplace with Wood Beam Gazebo 16x16 Built in Paver Fire Pit Private Well and County Water Supply Multiple Electric Gated Entrances 3 Oversized Garage Bays Full Pool Bath Irrigation System Whether youre seeking a private compound, a working equestrian facility with greenbelt status, or a future investment with potential to subdivide, 3530 Old Keystone Rd offers rare versatility. Ideally located just 10 minutes from the Gulf beaches, 30 minutes to Tampa International Airport, and a short drive to Orlandos theme parks, elite shopping, and fine diningthis estate also sits adjacent to the East Lake Sports Complex and Park, offering access to recreational amenities, walking trails, and community events. Its the definition of accessible luxury in a serene, natural setting. A lifestyle of elegance, equestrian excellence, and exclusive privacy awaits.