The California Highway Patrol is looking for witnesses to explain what led to the death of a bicyclist on Highway 29.
At about 4:15 p.m. Tuesday, the CHP received a call of a cyclist down on southbound Highway 29 south of Whitehall Lane, where the train tracks cross the highway, said CHP spokesman Marc Renspurger.
The cyclist, Matthew Newman, 52, of Napa, had apparently been riding by himself when he suffered a major head injury. He died Wednesday morning, Renspurger said. It's not clear whether Newman was wearing a helmet.
"Right now, we're treating it as a solo bicycle crash, but there might be more to it," Renspurger said.
Anyone with information should call the CHP at 707-253-4906.