A bicyclist participating in the Davis Double Century ride was run over by a semi-truck and died, the California Highway Patrol said.
The rider was identified as 50-year-old Ronald Cortez from Rocklin, Solano County Sheriff's Office confirmed.
Cortez was pronounced dead shortly after 5 a.m. at the intersection of Sparling Lane and Tremont Road.
Cortez was going northbound on Tremont Road as he approached Sparling Lane. Tremont Road has a stop sign at the intersection, while Sparling Road does not. CHP Sgt. Eric Brewer said Cortez failed to stop at the sign and was hit by a Valley Farms truck. The truck driver was on the job at the time of the crash.
"No alcohol or drugs were a factor, for sure," Brewer said.
Cortez had just taken off from Downtown Davis as part of the bike ride. Hundreds of people were taking part in the ride.