In the 1920s, State Highway 149 followed the old Route 15 path (now covered by I-84) between Route 32 and the Massachusetts state line. In 1930 or 31, this became part of SH 105.

The modern Route 149 was commissioned in 1932, renumbered from the 1920s SH 148. There have been no changes since then, although a fun 1953 Rand McNally typo extended the route north along Jones St. and Burrows Hill Rd. to Route 66.

• Route 149 Ends (Photos; Doug Kerr at state-ends.com)