Firefighters say forward progress has stopped in the 115-acre blaze, with 55% containment.
The 3-alarm fire is burning between Lake Herman Road and Channel Road. Benicia fire says Lake Herman Road is closed in both directions.
Fire officials say no residential structures are currently threatened and no evacuations ordered.
Fire officials are asking the public to use caution when driving in the are and give way to emergency vehicles.
Stay with ABC7 News on this developing story.