Route 63 follows a mostly northwest-southeast path its entire route, and is mostly a 2 lane road with some 4 lane sections. It begins at the corner of Whalley Avenue and Fitch Street in
New Haven where
Route 10 turns onto Fitch Street. Heading northwest on Whalley Avenue, it almost immediately passes the eastern end of
Route 243 and the northern end of
Route 122. About 0.6 miles later, it leaves Whalley Avenue for Amity Road at the southern end of
Route 69. It then passes under the
Wilbur Cross Parkway (
Route 15), offering southbound access only. After crossing into
Woodbridge, the road becomes less suburban in nature. In Woodbridge, it intersects the eastern end of
Route 114, and the southern/eastern end of
Route 67. It then crosses into
Bethany, where it has a brief (0.1 mile) concurrency with
Route 42. It then enters
Naugatuck, where the road takes on a more suburban character. It then meets the
Route 8 expressway at Exit 25A before crossing the
Naugatuck River into the Downtown area. It then passes by the western end of
Route 68 before becoming more rural again. After clipping the southwest corner of
Waterbury, it enters
Middlebury. After meeting the northern end of
Route 188, it intersects
I-84 at Exit 30, with access to/from the west. Access to/from I-84 east is provided by
Route 64 at the next intersection. Route 63 then enters
Litchfield County and the town of
Watertown. Here it is a major retail strip in the southern part of town. It meets the northern end of
Route 73 before crossing
US 6 in the center of town. It then becomes a minor arterial road north of town, and passes by the eastern end of
Route 132 before entering
Morris. In Morris, it has junctions with
Route 109 and the northern end of
Route 61. It then enters
Litchfield, where it meets
US 202 at the Litchfield Green. Leaving Litchfield, Route 63 becomes a minor rural road as it passes into
Goshen. It meets
Route 4 at a traffic circle in the center of town. North of there, it passes into Cornwall, where it meets the north end of
Route 43, then into the town of
Canaan. It has one junction with the southern end of
Route 126, which leads to
Falls Village. Route 63 ends approximately 1.5 miles later at
U.S. Route 7. A section of the road in
Litchfield is a designated state scenic road. ==History==