Built in 1917 by John Aspinwall, this extraordinary retreat is among Mid-Coast Maine's most exceptional private island properties. Set on a secluded 95-acre peninsula with 3,809 feet of waterfront, the estate enjoys sweeping views of Flying Passage and Muscongus Bay, offering remarkable privacy, natural beauty, and maritime charm. A haven for boaters and sailors, the property features a deep-water dock, granite pier, and new mooring with outstanding access to surrounding waters and islands. Thoughtfully renovated, the historic main residence preserves its architectural character while incorporating modern comforts. At its heart is a magnificent living room with an oak-truss cathedral ceiling and a dramatic 12-foot stone fireplace. A glass-enclosed sun porch captures panoramic water views, while expansive decks overlook the private beach and rugged shoreline. The home offers four bedrooms, including a serene primary suite with a double-sided fireplace, sitting room, and spacious en-suite bath. A well-appointed country kitchen with a butler's pantry is ideal for both everyday living and entertaining. A substantial barn, built in 2007, includes a beautifully finished year-round guest apartment with private deck overlooking the cove. Two charming shorefront cottages nestled among the evergreens further enhance the compound - a cozy sleeping cottage with a stone fireplace, the other a game room with potential for additional guest accommodations. Exceptionally self-sufficient, the property is supported by an artesian well and professionally installed solar, electrical, and generator systems, providing the reliability of a mainland residence. Satellite television and internet service ensure modern connectivity. Offered fully furnished and equipped, including a 2019 18-foot Parker center console with a 115-hp Yamaha engine, Aspinwall presents a rare opportunity to own a legacy Maine island retreat designed for gathering, recreation, and generations of unforgettable summers.