The fire remains at 2,490 acres, with containment on Wednesday night up to 75 percent, according to Cal Fire.
The fire began on Saturday afternoon southeast of Middletown near the Berryessa Estates subdivision, as Lake County News has reported.
Cal Fire said fire crews on Wednesday made good progress constructing fire line and strengthening current lines.
Fire crews also are continuing to patrol and mop up hot spots, Cal Fire.
Cal Fire said the resources that remain assigned to the incident include 746 personnel, 66 engines, seven water tenders, 19 fire crews, one helicopter and three bulldozers.
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