CLEARLAKE OAKS, Calif. – Firefighters have contained a wildland fire that burned several acres near Clearlake Oaks on Saturday evening.

The Sulphur Fire, contained just before 8 p.m., burned four acres, according to Cal Fire Capt. Will Schunk.

The incident was first reported shortly before 5:15 p.m. on Sulphur Bank Road near the Elem Colony, Cal Fire reported.

Firefighters arriving on scene found the fire making a run up the hillside, burning in brush and oak woodland, scanner reports indicated.

Cal Fire, Northshore Fire, Kelseyville Fire and Lake County Fire responded, Cal Fire Battalion Chief Greg Bertelli said.

The California Highway Patrol also was on scene to keep traffic away from the fire area, which was up a steep hillside along Sulphur Bank Drive.

Cal Fire sent aircraft including air attacks, two helicopters and three air tankers from Mendocino and Sonoma counties to work the blaze, based on reports from the scene.

The agency said 126 personnel were working the incident, along with eight engine/truck companies, one water tender, four fire crews, four overhead or command personnel, and two bulldozers.

There were no structures threatened, Cal Fire said.

Bertelli said Sulphur Bank Road was to remain closed temporarily due to the presence of fire equipment.

The fire's cause remains under investigation, Bertelli said.

Bertelli said firefighters have roped off what they have concluded is the area of the fire's origin.

“We're going to keep chain of custody through the night,” he said.

He added, “We've done a preliminary fire investigation,” with a Cal Fire prevention officer to arrive on Sunday to continue the investigative work.

Two engines will remain at the scene through the night, and will be relieved by two new engines and a hand crew on Sunday morning, Bertelli said, with those relief crews expected to be committed about half a day.

The fire came hours after Cal Fire and several local fire agencies conducted a fire exercise in the Clearlake area, as Lake County News has reported.

Bertelli said the fire exercise had gone well, and had been kept relatively short in case an actual incident arose.

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