In an update, Cal Fire said the blaze had burned 92 acres, revising an earlier estimate of 100 acres. The fire was first reported about 4:20 p.m. in the area of Ranch Place and Piedmont Road.
Residents who were evacuated have been allowed to return home, except for eight addresses in the 3600 and 3700 blocks of Sierra Road, San Jose Fire Department said shortly after 9 p.m.
There are 170 fire and law enforcement personnel are at the scene. No injuries have been reported and no structures damaged.
"Forward progress has been stopped. Resources will be committed through the night working on securing and implementing containment lines," Cal Fire said in the latest update.