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 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. 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 http://www.nyscanals.gov