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Lock C-6

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 C6 is located in the town of Fort Miller and is the northernmost lock on the Hudson River. The lock has a lift of 16.5 feet, lifting boats from 102.5 feet above sea level to 119 feet above sea level. Lock 6 is located north of Lock C5 by 4 miles and south of Lock C7 by 7 miles. Lock 6 was one of the first canal locks built on the modern canal system. The concrete for the lock and approach walls was mixed by a plant located on the east side of the present lock. Materials are delivered in canal boats — the stone from Northumberland, the sand from a bank near Sandy Hill.

Services Offered



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