RARE- CAR ACCESS ISLAND! Experience waterfront living at its finest with this exceptional St. Lawrence River home on prestigious Washington Island in Clayton. The car-access causeway gives you the best of both worlds: the privacy of an island with year-round accessibility by car, or a short, scenic 5-10 minute walk to the Village of Clayton. With 108 feet of pristine river frontage overlooking the main shipping channel, enjoy unobstructed 180-degree views of the majestic St. Lawrence, from breathtaking sunrises to gorgeous sunsets. Designed to maximize its incredible setting, the main level features an impressive open concept great room where expansive windows and sliding glass doors frame panoramic river views. The living room, dining area, and beautifully appointed kitchen flow seamlessly together, ideal for entertaining and everyday living. The kitchen showcases elegant quartz countertops, quality finishes, and exceptional water views, while premium hardwood flooring and custom ceiling details add warmth and sophistication throughout. The thoughtfully designed primary suite offers a private retreat, complemented by three beautifully finished full bathrooms. The finished lower level expands the living space with two additional bedrooms, a spacious family room, and flexible guest accommodations. Square footage is per a recent floor plan scan and includes the finished basement. Outdoor living is unmatched with three expansive riverfront decks, including an updated main deck with premium glass railings preserving the views, beautiful perennial gardens, and your own private beach area for the kids. The meticulously maintained shoreline features an elite dock system with a large lounging platform and two jet-ski lifts, plus an extra large boat lift installed in 2025, included in the sale. The owners have made decades of unforgettable, multi-generational memories here with family and friends and hope you will too. Enjoy Clayton's 4th of July fireworks from your own deck! Call today to schedule a private viewing!