Cameron Arana, who lived at Travis Air Force Base, died at 11:16 p.m. at the University of California Davis Medical Center, according to Mary Her, a senior office assistant at the coroner's office.
Arana was speeding north on Peabody Road on his motorcycle when he crashed near Waterworks Lane around 1:10 a.m., Fairfield police Sgt. Kevin Carella said.
He might have been racing a silver Acura before he lost control of his motorcycle and struck a signpost, Carella said. The other vehicle did not stop.
Arana was taken to Vaca Valley Medical Center in Vacaville and then transferred by helicopter to the UC Davis Medical Center, Carella said.