HUDSON RIVER, the principal river in the State of New York, North America. It rises in the Adirondack Mountains, in two streams, which unite in Warren county about 40 miles from their sources. Its course is irregular to Sandy Hill, being first S. by E. then E., after which it flows almost in a straight line nearly due S., and falls into New York Bay, in N. Lat. 40. 42., W. Long. 7. 1. 30. Its entire length is rather more than 300 miles; its breadth below Albany varies from 300 to 900 yards. Between Haverstraw and Piermont, for 10 or 12 miles, it expands into a broad basin 4 or 5 miles wide. It has few tributaries: the Mohawk flowing into it near Troy, and the Walkill at Kingston are the principal. The scenery is in the highest degree picturesque, its elevated banks not unfrequently rising in lofty and precipitous eminences. The largest ships ascend to Hudson about 117 miles, and schooners sail as far as Troy, 166 miles.