Crews were on scene for a one-acre brush fire burning in the area of Palomar Mountain Monday.
The fire sparked at 3:13 p.m. at South Grade Road near East Grade Road, according to Cal Fire officials.
The fire is on a ridge and was spreading due to heavy fuel in the area, Cal Fire officials said.
As of approximately 5:30 p.m., the fire was holding at one acre and the forward rate of spread had stopped.
At this time, the cause of the fire has not been found.
No other information was available.