OROVILLE, Calif. -

An ATV rider is dead and his passenger was badly hurt in a crash police say involved alcohol.

According to the CHP, a 49-year-old man from Oroville was operating a 2005 Honda TRX 450R in the area of Mills Ranch Road and Lumpkin Road at about 50 miles per hour when he lost control.

The ATV overturned, ejecting him and his passenger, Sarah Jones, 23, of Shingletown, Neither was wearing a helmet. 

The unidentified man was killed at the scene. Jones suffered major injuries and was taken to Enloe Medical Center by helicopter.

The cause of the crash remains under investigation, but the CHP says alcohol wasa factor.