A Sebastopol man died early Sunday when he apparently lost control of his pickup while speeding on Highway 116 near Jenner, the CHP said.

He was the fifth person since Friday to die in a crash in Sonoma County.

The man's name wasn't released Sunday as investigators were trying to contact relatives, a Sonoma County sheriff's official said.

The crash occurred just after 1 a.m. as the man was driving west on Highway 116, about a half mile east of Highway 1, CHP Sgt. David Derczo said.

The driver apparently was speeding and lost control of his 2004 Toyota Tacoma on a right curve, the CHP said.

The pickup traveled off of the south edge of Highway 116, hitting a guard rail and a pole.

The impact flipped the truck onto its left side and sent it sliding back across the highway into a dirt embankment, Derczo said.

The man, who wasn't wearing a seat belt, was partially ejected and was declared dead at the scene.

Emergency crews were called to the crash at 1:16 a.m.

His death came in the fourth fatal crash since Friday morning.

Late Friday night, two Sonoma Valley residents died in a collision on Highway 12 near Glen Ellen. Driver Justin Perkins, 24, of Sonoma was not wearing a seat belt and was partially thrown from the car, according to the CHP.

Passenger Morgan Marcy, 28, of Sonoma died at the scene. She was wearing a seat belt.

Nola Mary Wolf, 61, of Petaluma was killed Friday afternoon near Camp Meeker after being hit by a speeding car that flew off Bohemian Highway and smashed into a parking lot where Wolf was with a group waiting for a tour.

Early Friday morning, Glenn Richard Vierra, 58, of Guerneville died in a crash on Highway 116 near Cotati when an unlicensed driver pulled into the path of Vierra's motorcycle. The driver was arrested on suspicion of involuntary manslaughter.

You can reach Staff Writer Randi Rossmann at 521-5412 or randi.rossmann@pressdemocrat.com.