After running briefly on Main Street, Route 124 heads out of the town center as Oenoke Ridge.

Route 124 runs for another 4.2 miles (6.8 km) in the rural part of New Canaan until the New York state line.

Across the state line, the road become continues into Pound Ridge as Westchester Avenue.

In the 1920s, the road connecting the town centers of Darien and New Canaan was known as State Highway 302.

Another road from Norwalk through New Canaan center and continuing to Pound Ridge in New York was State Highway 184.