The fire started near Mount Hamilton Road and Crothers Road early Saturday morning.
San Jose firefighters and CAL Fire crews responded to the blaze by land and by air.
A large plume of smoke was seen in the area.
No structures threatened or evacuations, officials tweeted.
UPDATE: Crews making excellent progress on the fire. Estimated 55 acres. No structures threatened or evacuations. Extended overhaul expected. pic.twitter.com/jXBjIxNLeE
— San Jose Fire Dept. (@SJFD) July 11, 2020
Heat signature triggered an alert from GOES satellite. A quick look at @AlertWildfire show this smoke plume east of San Jose. #cawx @calfireSCU pic.twitter.com/jfbMnFzddH
— NWS Bay Area (@NWSBayArea) July 11, 2020
UPDATE: Crews making excellent progress on the fire. Estimated 55 acres. No structures threatened or evacuations. Extended overhaul expected. pic.twitter.com/jXBjIxNLeE
— San Jose Fire Dept. (@SJFD) July 11, 2020