Fire near Highway 166 and Cottonwood Canyon, east of Nipomo, has burned 2,044 acres

A brush fire that has burned 2,044 acres near Highway 166 and Cottonwood Canyon in the area straddling the San Luis Obispo and Santa Barbara county line is 98 percent contained, fire officials said Monday afternoon.

Fire investigators are still working to determine the cause of the fire, said Debbie Santiago, spokeswoman for the Bureau of Land Management.

It was reported at about 9:20 a.m. Saturday, when five acres initially burned and spread into the Carrizo Plain National Monument, according to San Luis Obispo County/Cal Fire.

The fire “went from a few acres to a few hundreds in a couple of hours,” Santiago said.

The area is about 30 miles east of Nipomo and northeast of Santa Maria.

Coastal fog and wet weather helped the 300 firefighters who continued to battle the flames on Monday, Santiago said.

No structures were threatened by the fire.