Cal Fire responding to 20-acre fire along the Altamont Pass

Aerial photo of the 20-acre Flynn Fire near North Flynn Road and Interstate 580. Photo courtesy Cal Fire SCU. 

Fire crews contained a grass fire at North Flynn Road and Interstate 580 in the Altamont Pass Friday night. 

The 41-acre fire was first reported at 6:38 p.m. Forward progress was stopped as of 7:23 p.m. an Alameda County Fire Department spokesperson said. 

Eastbound traffic on I-580 was backed up for two miles because of the fire, the fire department said. 

The fire did not appear to threaten any structures. The so-called Flynn Fire was just east of Livermore. 

Bay City News contributed to this report. 

Cal Fire responding to a 5-acre fire near Flynn Road in Altamont.