Comprised of 21 parcels encompassing an expansive +/- 1,500 acres California Stars Ranch (CSR) in the Borrego Springs desert adjoining State Park lands at multiple points extending the unencumbered views past the horizon. The terrain varies dramatically from deep lush washes, to rolling hills and dramatic cliffs to wide open fields filled with desert vegetation. CSR has 5 wells, 3 of which are capped and provide substantial high-quality water. The estate adjoins the Borrego Air Ranch (and includes two parcels on the Air Ranch), offering the luxury of an FAA approved private runway. A dedicated taxiway extends the runway to 4,000 feet when needed and facilitates seamless transportation of your aircraft from the Borrego Air Ranch runway to the private hangar on the property. CSR also has a 4,000-foot private (non-paved) crosswind runway. Nestled amidst the vast landscape is an exquisite residence, a testament to architectural innovation and natural harmony. The main dwelling, crafted in 2006 by the visionary James Hubbell and the esteemed Drew Hubbell Architects, spans 4,768 square feet. This masterpiece boasts five bedrooms with five en-suite baths, plus two half baths, its walls are two feet thick, constructed with straw-bale infill provide substantial insulation from the outside temperatures and showcase a commitment to sustainable living. A striking feature of the property is the 5,000 square foot airplane hangar, accompanied by a 1,560 square foot guest house comprising an open kitchen/living/dining area and one bedroom and one bath. The heart of this home lies in its well-appointed kitchen, equipped with stainless steel appliances, granite countertops, an oversized dining island, and a convenient walk-in pantry. The great room is adorned with built-in features, a large fireplace, and stained-glass front doors, creating an inviting and aesthetically pleasing space. The primary bedroom is a sanctuary, featuring a fireplace, an adjoining bath, separate office, and a very spacious walk-in closet. Four en-suite guest bedrooms provide comfort and privacy for visiting guests. Outdoor living on the large stone deck is embraced with a trellis and overhang, hosting an al fresco dining area, a large fireplace, a pool, and a spa. Ascend the staircase to discover an observation deck, offering panoramic views of the surrounding beauty and spectacular night skies (Borrego Springs is the world’s second IDA International Dark Sky community). Beneath the surface lies a subterranean garage/game room, with epoxy flooring, capable of housing up to 12 cars. This versatile space extends beyond mere parking, providing an ideal area for a workout and entertainment zone. The property&#39's commitment to sustainability is underscored by a solar system array generating 70MW/year, providing energy for both homes and a well. For added resilience, a whole house propane generator is in place, ensuring uninterrupted power for the main residence. California Stars Ranch stands as a testament to meticulous design, blending luxury with eco-conscious living, creating a haven where modern comfort meets the serenity of nature. Parcels included in sale: 201-180-20-00, 201-180-53-00, 201-180-06-00, 201-180-33-00, 201-180-27-00, 201-180-28-00, 201-191-49-00, 201-180-25-00, 201-180-58-00, 201-180-64-00, 201-180-51-00, 201-180-38-00, 201-180-46-00, 201-180-29-01/201-180-29-02, 201-180-62-00, 201-150-09-00/201-150-10-00, 201-150-23-00, 201-220-04-00.