Firefighters have stopped at 170 acres a brushfire burning Saturday along a cove at Lake Castaic.

“A rapid and aggressive attack by the Forest Service and Los Angeles County Fire have stopped the forward rate of spread holding the fire at appropriately 170 acres,” said Incident Commander Oscar Vargas.

All aircraft were released and crews were expected to remain at the fire scene overnight to build lines of cleared vegetation and look for hot spots to put out, the USFS said.

The blaze was reported by lifeguards just after 4 p.m. as a 1/4-acre brushfire, which quickly spread to 20 acres, said Los Angeles County Fire Department officials.

Just after 5 p.m., the U.S. Forest Service reported the fire had blackened 150 acres of forest service land, spreading through dry brush with high temperatures and low humidity. That figure was quickly upgraded to 160 acres.

No structures were threatened and no injuries immediately reported.

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