The blazes occurred near southbound Highway 680 south of Calaveras Road and north of Andrade Road and were all less than a quarter-acre in size, fire spokeswoman Aisha Knowles said. Fire crews responded to the scene at 5:32 a.m.
According to Knowles, the blaze may have been sparked by a dump truck hitting a power pole in a quarry. She said power is currently out to the area and Fire Station 14.
Cal Fire and the Livermore-Pleasanton and Fremont fire departments are also assisting in the battling the fires.