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Lock C-4

By Water

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All motorized recreational vessels passing through any lock or lift bridge on the Canal System must purchase either a Seasonal Pass, a Ten-Day Pass or a Two-Day Pass. Information on fees and how to obtain a pass can be found at or by calling Canal Corporation Headquarters (between 8:00 am – 4:00 pm) at (518) 436-2799.


Lock C-4 is located just north of the town of Mechanicville and Lock C-3 (1.83 miles), where the canal diverges from the Hudson River for a short while creating an artificial island. This lock lifts boats up 16 feet from the river (elevation: 67.5 feet) into an artificial channel (elevation: 83.5 feet). The Lockmaster can be reached by VHF Radio channel 13 or by phone at (518) 664-5261.

Services Offered

Lock 4 Canal Park. Tie up on the northeast, upper terminal wall. Short walk to Village of Stillwater, Stewarts, gas, restaurants. Picnicking, Fishing


Season And Hours Open

May 1 - May 25 - 7:00 am - 5:00 pm

May 26 - Sept. 7 - 7:00 am - 10:00 pm

Sept. 8 - Nov. 15 - 7:00 am - 5:00 pm

Note: Hours of operation may change from season to season. For current hours of operation, contact the New York State Canal Corporation at 1-800-4CANAL4 or