The fire was first reported just before 2 am on Sycamore Road near Coyote Drive.
Fire officials say 40 acres have burned, but no homes are threatened. The blaze is 40% contained.
#SycamoreFire Firefighters are battling a 40 acre wildland fire on Sycamore Rd x Coyote Dr southeast of Tollhouse. Limited access & steep terrain have made it challenging for crews, 40% contained, no injuries, cause under investigation. pic.twitter.com/pSMuYf54bK— CALFIRE/FresnoCoFire (@FresnoCoFire) June 23, 2020
Several units responded to fight the blaze. Officials said a steep terrain and limited access to the flames have made fighting the fire challenging for firefighters.
A road closure is in effect at Sycamore and Watts Valley Road. It wasn't immediately clear when the roadway would reopen.
The cause of the fire is under investigation.