Fire off Highway 166.
Smoke rises from the vegetation fire off Highway 166 east of Highway 101 on Friday afternoon, with a colorful line of fire retardant evidence of the firefighting activity. (PG&E photo)

Firefighters have surrounded 100% of a blaze burning grass and brush off Highway 166 on land between the Cuyama Valley and the Central Coast. 

Shortly after 4 p.m. Friday, firefighting crews from multiple agencies began responding to the incident northeast of Highway 166 and near Rancho Rinconada, according to emergency dispatch reports. 

The Rinconada Fire had blackened about 100 acres and was 100% contained, according to U.S. Forest Service officials Saturday evening.

While many resources had been released, some crews were expected to again remain at the scene overnight into Sunday morning or long for mop-up operations.

The cause of the fire remained under investigation on Saturday.

In addition to ground crews, several aircraft including air tankers along with Santa Barbara County Air Support Unit helicopters were dispatched to the fire on Friday afternoon.

The aerial resources, a lack of winds and other factors boosted firefighters’ efforts to corral the fire, Forest Service officials said.

In addition to firefighters from the Los Padres National Forest, agencies sending personnel and equipment to the incident included the Santa Barbara County Fire Department, Cal Fire and the Bureau of Land Management fire department.