A once-in-a-generation opportunity to acquire one of Rumson's most extraordinary waterfront compounds. Encompassing approximately 5.4+ private acres along the storied banks of the Navesink River, this incomparable estate presents four distinct residences -- each fully independent and impeccably appointed -- behind a private gated entry that opens onto a gracefully winding drive, revealing its full magnificence only gradually, as the finest estates should. A compound of this scale, this craftsmanship, and this rarity on the Navesink does not come to market twice. The main residence at 100 W. River is a testament to uncompromising craft and enduring quality. Custom built to the most exacting standards, the home offers 6 bedrooms, 7 full and 3 half baths and an endless list of amenities -- four floors of luxury living with breathtaking river views, a private elevator, radiant heat and wide-plank hardwood flooring, custom millwork and tasteful Venetian plaster wall and ceiling treatments. A grand entry foyer gives way to principal rooms of exceptional scale -- a chef's kitchen appointed with statuary marble, professional-grade appliances by Sub-Zero, Gaggenau, Wolf, and Miele, multiple fireplaces, a screened porch overlooking the river, and a finished lower level complete with cedar sauna, exercise room, and hot tub. The primary suite is a sanctuary unto itself, with a gas fireplace, private sitting room/library, and a spa-caliber bath with Perrin & Rowe fixtures and tile by Ann Sacks. The guest residence at 98 W. River sits on its own parcel and rivals the main house in quality and ambition -- offering 4/5 bedrooms, 4.5 baths thoughtfully adorned with top of the line plumbing fixtures and its own set of endless amenities. Four finished floors of living space ensure your guests will enjoy their stay at this incredible property. A staff house and carriage house -- each a fully self-contained residence -- round out the compound, offering exceptional versatility for staff, extended family, or guests. At the water's edge, a boathouse with fiberglass rooftop deck and an Ipe dock with boat lift place the Navesink at your doorstep. An infinity-edge pool with travertine surround, English-inspired hedged gardens, a mature apple orchard, a greenhouse, and bluestone walkways compose grounds of rare beauty -- fully irrigated and meticulously maintained. Eight-car garage capacity completes the offering. Minutes to the Jersey Shore's finest beaches, prestigious yacht and country clubs, and NYC ferry service.