The fire broke out just north of the campgrounds near Castro Valley. No structures were burned or threatened. A few campers were evacuated as a precaution.
Crews from Cal Fire, the Oakland Fire Department and the Alameda County Fire Department all responded to the scene.
The fire was 100 percent contained by 6:15 p.m. but Cal Fire Batt. Chief Jim Crawford expects it won't be completely out until sometime Tuesday.
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