The portion of NY 73 between Tahawus and North Hudson was removed from the state highway system . As a result, NY 73 was truncated to a new western terminus at US 9 in Schroon, eliminating the concurrency with US 9. To the north, NY 427 was supplanted by an extended NY 86A . In November 1952, NY 73 was extended eastward through Ticonderoga to the ferry dock on Lake Champlain, where it connected to the Fort Ticonderoga–Larrabees Point Ferry. The change supplanted NY 347, a short spur route off NY 22 that had been in place since . A month earlier, NY 73 was extended northward to Lake Placid via Underwood and Keene, replacing NY 86A and overlapping US 9 from Severance to Underwood. NY 73 was truncated to its current eastern terminus in Underwood on July 1, 1971, eliminating the overlap with US 9. Its former routing from Schroon to Lake Champlain was renumbered to NY 74.