Kentucky Route 337

KY 337 begins at an intersection with KY 70 (Liberty Road) in the southern part of Mannsville, within Taylor County. It travels to the north and curves to the north-northeast. It intersects the eastern terminus of KY 744 (Spurlington Road). It passes Mann Cemetery and then crosses over Black Lick Creek. The highway begins paralleling Tallow Creek and passes Tallow Creek Cemetery. At Lucian Sallee Road, it leaves the creek. It then curves to the north-northwest and enters Marion County.

KY 337 turns right onto KY 49, and the two highways travel concurrency to the east-northeast. They curve to the east-southeast and cross over Big South Fork. They curve to the northeast and enter Bradfordsville, where they split. KY 337 continues to the northeast and crosses over Jones Creek. It then crosses over Rubin Cooley Branch. After a slight curve to the north, the highway curves back to the northeast and crosses over North Rolling Fork. Just south of Gravel Switch, it meets its northern terminus, an intersection with KY 243 (Gravel Switch Road).