Two motorcycle riders were seriously injured in a crash near Novato on Wednesday night, a California Highway Patrol officer said.
A 38-year-old man was killed in a solo-motorcycle crash in San Jose early Thursday morning, San Jose police said.
Neither the man nor the woman were wearing helmets.
A motorcyclist was killed in a crash on northbound Interstate Highway 880 in Oakland late Friday morning, according to the California Highway Patrol.
A fatal collision involving a motorcycle and car was blocking two lanes on the Bay Bridge Friday morning, according to the California Highway Patrol.
A Canadian man, who crawled up a ravine after he crashed his motorcycle just north of Fort Ross near Timber Cove on Tuesday afternoon, suffered serious injuries, according to the California Highway Patrol.