Welcome to Casa Lago, a rare private lakefront estate spanning 51+ acres across two legal parcels in one of Fallbrook's most scenic settings. The main parcel encompasses approximately 19 acres and features a 5,891 sq. ft. single-level lodge-style residence with 6 bedrooms and 4.5 bathrooms, designed to capture sweeping mountain and lake views. The approximately two-acre stocked lake-expanded and fully lined with over $200,000 in improvements-serves as a striking centerpiece. Inside, the home offers a grand great room with soaring beamed ceilings and walls of glass, a chef-caliber kitchen, formal dining, and quality finishes throughout. The primary suite includes a fireplace and tranquil views, while en-suite guest rooms provide comfort and privacy. Wrap-around verandas and a resort-style pool and spa create seamless indoor-outdoor living. The grounds include a detached recreation building with a full-size racquetball court, pickleball court, shuffleboard, pool table, and game lounge. Additional features include leased solar, a flower-growing area, private go-kart track with hangar, and space suitable for equestrian use. The second parcel consists of approximately 32 acres with underground utilities and panoramic views, offering potential for a variety of uses, subject to buyer verification. Conveniently located approximately six miles to I-15, providing access to San Diego, Los Angeles and multiple regional airports. Casa Lago presents a rare opportunity to own a private lakefront estate in San Diego County.