Foundry Cove is a sheltered tidal bay on the eastern shore of the Hudson River in Cold Spring, New York. The primary public access point is Foundry Dock Park, located at 47 Market Street. This park features a small boat launch area designated as part of the Hudson River Greenway Water Trail. Hand launching of kayaks and canoes is free and does not require a permit, though a permit is needed for launching with a trailer. Kayak and canoe rentals are available on-site through Hudson River Expeditions. The cove itself is known for its calm, protected waters, often described as glassy, making it suitable for beginners and families. It serves as the gateway to the Constitution Marsh Sanctuary, a significant Audubon-managed tidal marsh that is a haven for waterfowl and migratory birds, including herons, cormorants, and Peregrine Falcons. Accessing the marsh from the cove requires paddling under a railroad trestle, a maneuver that is tide-dependent. At low tide, mud flats can obstruct passage, while at high tide, clearance beneath the trestle may be unsafe. Paddlers should never cross over the railroad tracks. Timing for this entry is best estimated by consulting tide charts for nearby Peekskill or Beacon. The cove and the adjacent stretch of the Hudson River can experience significant tidal currents, and paddlers are advised to plan trips around slack tide or to paddle with the flood current. Wind can kick up texture and chop on the broader river, but the cove itself is largely sheltered. During summer weekends, the launch area and nearby waters can become quite crowded with rental kayaks, stand-up paddleboards, and other paddlers. The area holds historical significance as part of the West Point Foundry site, a National Historic Landmark. The park is open from dawn to dusk year-round.