DUTCH JOHN, Daggett County — A California man has died from injuries sustained in a Wednesday night motorcycle crash, according to the Utah Highway Patrol.

Stephen Trottier, of La Mirada, Calif., was riding on state Route 191 about 4:50 p.m. when his motorcycle left the roadway for unknown reasons, hit a tree and overturned, said UHP trooper Matt Pratt.

Trottier, 55, was found about 15 feet from his motorcycle. He was wearing a helmet and protective clothing, but suffered serious injuries to his head and neck, Pratt said.

Troopers closed the road in both directions to allow a medical helicopter to land at the scene. Trottier was flown to a Wasatch Front hospital, where he died Thursday morning, Pratt said.

The cause of the crash remained  under investigation.

Geoff Liesik

Twitter: GeoffLiesik