A fire that burned an estimated 100 acres between Coloma and Pilot Hill on Thursday afternoon was reported 75 percent contained shortly after 6 p.m.
Brice Bennett, a spokesman for the California Department of Forestry and Fire Protection, said the forward progress of the fire had been halted. Although structures initially were threatened, firefighters were able to prevent any damage to buildings.
The Adventure fire started at 2:05 p.m. and spread rapidly, Bennett said. It burned in the area of Bacchi Road, north of Marshall Grade. The area burned had been estimated at 200 acres, but after the area was surveyed Thursday evening, fire officials issued the revised figure of 100 acres.
A section of Highway 49 was closed during the afternoon between Bacchi Road and Forgotten Loop due to firefighting activity. Highway 49 reopened to traffic about 7 p.m., but motorists were urged to drive slow through the area as fire crews were expected to be on scene throughout the night.
Cal Fire reported 21 engine and truck companies, six fire crews, two bulldozers, three water tenders, two helicopters and four air tankers responded to the fire, which burned in grassy oak woodlands on both sides of Highway 49.
Bennett said the cause of the fire has not been determined.