Experience the extraordinary at 639 Three Eagle Lane - a rare 10-acre gated Swan River estate offering 712+ feet of premier river frontage on some of the deepest waters of the Swan River. Located just minutes from downtown Bigfork with no HOA or covenants, this private legacy property captures breathtaking views of the Swan and Mission Mountain ranges. The 5,417 sq. ft. custom residence, built by premier builder Charlie Snider, blends timeless Montana craftsmanship with refined luxury. The main level features three expansive suites, including a stunning primary retreat with private deck access overlooking the river, spa-inspired bath with heated tile floors, oversized soaking tub, dual-head walk-in shower, and custom walk-in closet. The gourmet kitchen is designed for both entertaining and everyday living with granite countertops, custom solid wood cabinetry, Wolf 6-burner cooktop, double convection ovens, Sub-Zero refrigerator, warming drawer, and a separate wet bar. The vaulted great room showcases walnut hardwood floors and a striking North Fork river rock wood-burning fireplace. A loft theater/game room captures sweeping Swan Mountain views. Outdoor living is exceptional with a massive riverfront deck, stone fireplace, retractable awning, private dock with EZ Launch kayak system, fenced garden, and circular drive with fountain. The 36' x 40' heated shop with 14' doors, additional storage building, and multiple RV hookups provides flexibility for recreation and storage. Additional highlights include a heated 3-car garage, energy-efficient multi-zoned heat pump system, central vacuum, 100-year roof tiles, and an owned propane tank. A beautifully finished 4-bedroom, 2-bath guest residence completed in 2024 offers ideal space for extended guests or potential supplemental income. Quartz countertops, Wood floors, and a pellet stove. A true Montana riverfront sanctuary - private, refined, and irreplaceable.