A 59-year-old man riding a bike near Lower Lake on a foggy morning Tuesday was knocked to the ground by a hit-and-run driver, then killed when a second car ran him over, CHP officials said.

CHP officers later arrested the suspected hit-and-run driver, a Clearlake woman who turned herself in nearly two hours after the 7:45 a.m. collision along Highway 29.

Aimee C. Hubbard, 25, was booked into Lake County Jail on suspicion of felony hit-and-run causing injury, CHP Sgt. Kevin Domby said.

Highway 29 was closed for four hours as investigators examined evidence sprawled across the two-lane road, forcing motorists to take a detour through Cobb Mountain on Highway 175.

The bicyclist was a resident of Lower Lake. Lake County sheriff's officials were still notifying his family late Tuesday and his name wasn't released.

Hubbard's 1999 Chevrolet Suburban apparently clipped the bicyclist on the highway north of Clayton Creek Road, the CHP said. The bicyclist spun around and ended up in the middle of the road.

Hubbard "did not stop at all," Domby said.

But two other people in northbound vehicles saw the man and his bike in the road and pulled over to help, Domby said.

The bicyclist was stirring on the roadway and may have been trying to get up when a 2008 Toyota Prius driving north on Highway 29 came upon the man and ran over him and his 24-speed Fuji bike, Domby said.

The Toyota driver, John Weeks, 62, of Hidden Valley Lake, stopped and stayed at the accident scene.

The bike rider was pronounced dead at the scene.

The CHP issued a public alert for a hit-and-run driver in a black SUV in connection with the dual accidents.

At about 9:40 a.m., CHP officers were contacted about a distraught woman who was at the Clearlake Police Department.

She said she thought she'd hit a deer earlier in the morning on Highway 29 with her burgundy Chevrolet. But she'd later heard a person had been hit and killed in the same area, according to a CHP dispatch log.

CHP officers interviewed and then arrested the woman on suspicion of felony hit-and-run, CHP Officer Kory Reynolds said.

The woman had young children in her vehicle and may have been taking them to school, Reynolds said.

Highway 29 heading into Lower Lake is a busy route during the morning commute.

"There was heavy fog reported in the area and a damp roadway," Domby said.

The fog was thick and varied, blowing in and out, and officers are interviewing witnesses to determine visibility at the time of the crashes, he said.

The posted speed limit is 55 mph.

The highway was closed until just after 2 p.m. for the investigation.

You can reach Staff Writer Julie Johnson at 521-5220 or julie.johnson@pressdemocrat.com.

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