Pilots from Columbia Air Attack Base concentrated Sunday on the north side of the Quarter Fire near Cedar Ridge while helicopters worked the south side, the U.S. Forest Service - Stanislaus National Forest reported.
Sunday afternoon, the fire was estimated to cover 15 acres in rugged terrain.
The terrain made it difficult for ground crews to reach the area quiakly after it started around 7:30 p.m. Saturday.
They were able to get into the fire area around 3 p.m. Sunday, working in temperatures nearing 100 degrees in hot and dry conditions from the south side.
Homes along Grant Ridge were threatened but structure protection was put in place, the Forest Service said.
The fire is burning on the north side of the Stanislaus River only.
It grew from three aces overnight.
The fire is located in the south fork of the Stanislaus River Canyon, three miles upstream of the Lost Dutchman Mining Association property in the Grant Ridge (3N11) area.
An evacuation advisory, which means be ready to go, was issued for all of Cedar Ridge Saturday night by the Tuolumne County Sheriff’s Office.