ROUTT COUNTY, Colo - A four-acre wildfire is burning in Routt County in Northern Colorado.
The South Fork Fire is burning in the South Fork Elk River Drainage within the Mount Zirkel Wilderness.
The U.S. Forest Service says the fire was sparked by lightning on Tuesday at about 2:30 p.m.
The fire is burning in heavy fuels and beetle kill, officials said.
Campers and hikers are being asked to leave the area, and trail closures are being implemented for the Wolverine Basin area and North Lake Trail (Forest Trail 1164).
"Crews will not engage the fire, rather will monitor and clear recreationists from area trails," officials said.
A helicopter has been ordered to help officials on scene.