Firefighters worked Monday to cut containment lines around the still raging Cow Hollow Fire in Duchesne County.
The lightning-sparked fire, which started last Friday, had blackened nearly 300 acres of dense, rugged spruce and fir terrain in Ashley National Forest by Monday morning and began the day at just 25 percent containment.
The blaze is roughly 10 miles south of the eastern Utah town of Fruitland, Fire Information Officer Louis Haynes said.
About 170 firefighters, with the support of fire retardant-laden air tankers and water-bearing helicopters, were battling the flames.
Haynes said crews hope to fully contain the Cow Hollow Fire by nightfall Tuesday.
Crews did celebrate 100 percent containment of the Slope Fire, which had burned 725 acres in Millard County’s Wah Wah Mountains. It, too, had been sparked by lighting last Thursday, scorching brush and grass in Bureau of Land Management property.
Neither of the wildfires threatened structures and no injuries were reported.
Much of Utah remained under a “Red Flag” wildfire danger warning into late Monday night as low humidity, parched vegetation and winds gusting to 50 mph plagued the northwest, southwest and southcentral regions of the state.