- Southern Terminus:
- Tresser Boulevard (US 1) in Stamford
- Northern Terminus:
- New York-Connecticut state line
- 9.33 miles
CT 137 is a north/south route in Stamford. It begins at Tresser Boulevard (US 1) and runs north as Washington Boulevard. It then curves to the east as Cold Spring Road before turning north again onto High Ridge Road. High Ridge Road runs north until it hits the New York-Connecticut state line. It continues into New York as NY 137. CT 137 is a four-lane road south of the Merritt Parkway (CT 15) and a two-lane road north of it.