Discover Colorado ranch living at its finest with this exceptional 640-acre estate just outside of Ault, CO. Bordering the pristine Pawnee National Grasslands on three sides, this rare property combines luxury, functionality, and breathtaking natural beauty. The custom-built home showcases high-end finishes throughout, including a chef's kitchen with GE Monogram appliances, custom hickory cabinetry, and a spacious island that opens to the dining room, four-seasons room, and great room with impressive beam design-all with panoramic views. The expansive primary suite offers a private retreat featuring a cozy reading nook, gas fireplace, spa-inspired 5-piece bath with steam shower and jetted tub, and a loft with private patio showcasing the best views in the home. Additional highlights include a refined library, a large game room designed for entertaining, an indoor greenhouse for year-round gardening, and a separate studio apartment above the three-car garage. Built with advanced systems, the home includes hot water radiant floor heating, backup forced air, multi-zone air conditioning, dual propane tanks, three wells (with premium filtration on the house well), and a seasonal stream flowing to a peaceful pond (when full is 18ft deep). Beyond the residence, this property is an ideal cattle ranch with optimal grazing land, fully fenced pastures, and abundant space for agricultural use. Whether you're seeking a working ranch, equestrian property, or private sanctuary, the land offers unmatched versatility. With sweeping views of the Pawnee National Grasslands and the Colorado plains, this estate provides a rare opportunity to own a luxury home paired with productive grazing land, all in a serene and private setting.