Perched in the scenic enclave of Sierra Del Oro, adjacent to Yorba Linda, this stunning Mediterranean-inspired estate offers breathtaking panoramic views of the San Gabriel and San Bernardino Mountains, including Mt. Baldy, and a mesmerizing display of twinkling city lights. Tucked away in an incredibly private setting with only one nearby neighbor, this 4-bedroom, 4-bathroom residence is a true sanctuary of elegance and tranquility. A flagstone courtyard with a serene waterfall fountain welcomes you to a double-door foyer, setting the tone for the sophistication within. Inside, soaring two-story ceilings and floor-to-ceiling windows bathe the living and dining areas in natural light, seamlessly blending indoor and outdoor living. A stately fireplace and French doors open to the backyard, while plush new carpeting extends into the inviting family room, complete with a second fireplace and exquisite custom wood plantation shutters. The chef's kitchen is seamlessly connected to the family room and features gleaming granite countertops with a full-stone backsplash and upgraded stainless steel appliances, including a beverage chiller, a preparation island, a breakfast bar, and a spacious walk-in pantry. A convenient downstairs bedroom with an adjacent full bath serves as a versatile retreat for guests or a home office. The primary suite is a private oasis, offering unparalleled seclusion with no neighbors in sight-just the tranquil embrace of nature. This luxurious retreat boasts wood plantation shutters, a dual fireplace, a separate retreat area, a spacious walk-in closet, and a spa-inspired bathroom with a soaking tub and a walk-in shower. Step onto your private balcony at sunset to savor the cool evening breeze and breathtaking bird's eye views of city lights and the mountain landscape.  The upper level is completed by two additional en-suite bedrooms, wood plantation shutters, new plush carpet, and a charming study that opens to a front balcony. Outdoors, the pool-sized backyard is a haven of relaxation, featuring forever views, a roofed gazebo, a California room, and a glass firepit-ideal for intimate gatherings or grand soirees under the stars. Modern comforts abound with new dual Lennox heating-and-air systems, a whole-house fan, and a 3-car garage equipped with a 60AMP Tesla charger. A rare fusion of elegance, privacy, and natural beauty, this exceptional home offers an unparalleled lifestyle for those seeking refined luxury in a breathtaking setting.