A Saint Helena man was severely injured in a Wednesday night motorcycle crash that authorities say appeared to be alcohol-related.

Jason De Alba, 21, reportedly was traveling at an unsafe speed on southbound Crystal Springs Road just north of town when he veered off the road and struck a tree near Rose Lane around 8:15 p.m., the CHP said.

De Alba was ejected from the motorcycle, the CHP said. He was not wearing a helmet.

The victim was airlifted to Santa Rosa Memorial Hospital, where he was listed in critical condition on Thursday, a nursing supervisor said.