13221 Harness Welcome to this exceptional Rancho Cucamonga estate offering approximately 5, 140 square feet of living space, 5 bedrooms, 4.5 bathrooms, and an extraordinary resort-style setting on approximately 0.53 acres. Designed for comfort, versatility, and entertaining, this impressive two-story residence features TWO PRIMARY SUITES on separate levels, providing exceptional flexibility for multigenerational living, extended family, or guests. The spectacular backyard is a true showstopper, featuring a custom swimming pool with cascading rock waterfalls, a built-in waterslide, and stunning Yosemite-inspired rockwork incorporating a unique bear design. Multiple levels of expansive patios, a beautiful covered pavilion, outdoor BBQ area, and custom gas fire pit with built-in stone seating create an unforgettable entertaining experience. A hidden, centrally located courtyard with its own private entrance offers a peaceful retreat surrounded by French doors. Inside, the thoughtfully designed floor plan provides an ideal balance of gathering spaces and private retreats, with special two bonus rooms. Upstairs, the luxurious second primary suite includes a cozy fireplace, separate sitting or office area, expansive L-shaped walk-in closet, and upgraded bathroom with a soaking tub, beautiful stone countertops, and separate shower. Two additional bedrooms share a Jack-and-Jill bathroom, while the fifth spacious bedroom offers access to a recently upgraded bathroom with a walk-in shower. An expansive upstairs loft with upgraded built-in entertainment cabinetry and bookshelves provides additional living space, complemented by convenient balcony access from the upper-level areas. Additional highlights include hardwood flooring, multiple fireplaces, central air conditioning, a three-car garage, and TWO separate driveways, including dedicated RV parking with an existing 220V electrical connection. The expansive grounds also feature THREE storage sheds and FIVE fruit trees, including orange, plum, and apricot varieties. Offering exceptional space, privacy, distinctive custom features, and spectacular outdoor amenities, this remarkable property blends the very best of Southern California resort-style entertaining. A truly special place to call home!