Bicyclist killed during race in Dixon

A bicyclist was killed in Solano County on Saturday morning when he was hit by a truck while participating in the Davis Double Century bike ride, authorities said.

The 50-year-old bicyclist from Rocklin was riding north on Tremont Road in Dixon at about 5:10 a.m. when he entered the intersection of Sparling Lane, the California Highway Patrol said.

Tremont has a stop sign at the intersection, but Sparling does not. When the bicyclist, whose name has not been released, entered the intersection, he did not stop at the stop sign and ended up riding into the path of a Kenworth tractor-trailer truck pulling a set of double trailers.

The driver, identified as 62-year-old Jose Rios, was traveling east on Sparling at about 50 to 55 mph and could not stop in time, the CHP reported. He ran over the bicyclist, who was pronounced dead at the scene.

Authorities said the bicyclist was riding in the Davis Double Century, a 200-mile ride through Yolo, Solano, Napa and Lake counties. The route began in Davis, about 6 miles from where the fatal crash occurred.

Sparling was shut down for about 2½ hours for a crash investigation, the CHP said. Ride organizers rerouted the course at the intersection of Tremont and Robben Road during that time.

Investigators have ruled out alcohol as a factor in the crash.

Vivian Ho is a San Francisco Chronicle staff writer. E-mail: vho@sfchronicle.com Twitter: @VivianHo