The crash happened on Ygnacio Valley Road between Crystyl Ranch Drive and Cowell Road,
The Concord Police Department said the 32-year-old man was pronounced dead at the scene of the 1:22 a.m. crash.
The driver of the vehicle, a juvenile, was not reported to be injured and was cooperative.
The collision is still under investigation. Any witnesses are asked to contact Concord police at 925-603-5963.