Welcome to a truly unique San Antonio Heights property offering two residences on an expansive approximately 0.84-acre lot in one of Upland's most desirable foothill locations. Set along N. Euclid Avenue, this exceptional property combines privacy, space, flexibility, and breathtaking panoramic views of the surrounding mountains, city lights, and mature trees. The property features two separate residential structures, providing an outstanding opportunity for multigenerational living, extended family, guests, rental income, or a private home-and-guest residence arrangement. Total square footage approximately 4,058 square feet of combined living space, 5 bedrooms, and 4.5 bathrooms. One of the residences has historically been described as a charming two-story one-bedroom, one-bath retreat featuring a sunroom with spectacular views, hardwood flooring, spacious living room with fireplace, formal dining area, cozy kitchen, and dedicated laundry/storage space. The main residence has two bedrooms downstairs and the Primary is upstairs. The home also enjoys panoramic mountain, city-light, and tree-lined views. The expansive lot provides an extraordinary sense of privacy and opens the door to numerous possibilities for outdoor entertaining, gardens, recreation, or simply enjoying the natural beauty of the San Antonio Heights setting. The property is surrounded by mature landscaping and offers a tranquil atmosphere while remaining conveniently located near Upland's shopping, dining, schools, parks, and major transportation routes.