A Newcastle, WY., man has been identified as the person who died Saturday night in a motorcycle crash west of Lead.

Preliminary information indicates that a 2017 Harley Davidson FLSTC Motorcycle was westbound on U.S. Highway 14A when the driver failed to negotiate a curve. The motorcycle traveled across the roadway and into the ditch.

Both occupants were thrown from the motorcycle. Chrisjen McIlvain, the 31-year-old male driver, was pronounced dead at the scene. Marina McIlvain of Newcastle, WY., the 29-year-old female passenger, suffered life-threatening injuries and was airlifted to a Rapid City hospital. Neither person was wearing a helmet.

South Dakota’s Highway Patrol is in charge of the investigation. All information is preliminary at this time.