It happened on Monday, Aug. 17 at around 1:30 p.m. in the town of Kent.
Robert J. Costabile, 69, of Valhalla, was operating a 2016 Harley Davidson motorcycle on the northbound side near Hortontown Hill Road when, for unknown reasons, was unable to negotiate a curve and lost control before leaving the roadway, state police said.
Costabile succumbed to his injuries and was pronounced dead at the scene, police said.
This investigation remains ongoing.
Click here to follow Daily Voice Kingston and receive free news updates.