Samuel Douglas Murphy, 26, of Cobb, was the victim of the crash, according to Capt. James Bauman of the Lake County Sheriff's Office, which handled the coroner's case.
According to a California Highway Patrol report, the crash occurred just after 7:30 p.m. Tuesday, June 14.
Murphy was riding a Yamaha ATV alone and without a helmet, traveling northbound on Gifford Springs Road south of Tanya Terrace, at an undetermined high rate of speed, the CHP reported.
He was traveling uphill and drove straight through a right curve in the road. The CHP said Murphy went off the roadway and collided with a cluster of trees along the east shoulder.
Murphy sustained fatal injuries as a result of the collision and was pronounced dead at the scene, the CHP said.
The CHP report said alcohol is believed to have been a factor in the collision.
Officer Adam Garcia is investigating the incident.
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