Whitfield Street, Broad Street, Church Street, Durham Road, Guilford Road
- Southern Terminus:
- Whitfield Street (CT 146) and Boston Street (CT 146) in Guilford
- Northern Terminus:
- New Haven Road (CT 17) in Durham
- 13.85 miles
- New Haven, Middlesex
CT 77 is a north/south route between Guilford and Durham. It is a two-lane undivided road through rural areas. Most of it is a designated scenic route.