A wildfire in the Big South Fork National River and Recreation Area spans about 110 acres and is 10 percent contained, according to authorities.
The blaze is expected to spread south between Station Camp Road and the Big South Fork National River, according to park management officials.
Dubbed the "Big Island Fire," it first was reported burning Friday with a size of 60-80 acres.
The cause is being investigated.
East Tennessee has been plagued by a series of wildfires for several weeks that have consumed thousands of acres. Some, including a blaze on Chilhowee Mountain in Blount County, have been burning since last week.
As of Friday, most of the fire was located "on the east side of Station Camp Road in the Slaven Branch Drainage."
According to an update Monday afternoon, the fire was expected to spread south between Station Camp Road and the Big South Fork National River.
"There are no existing natural or manmade barriers to check the fire spread," according to a release from Big South Fork officials.
Fire crews are working on a fire line, about 2 miles in length. The nearest structures are about 3 miles away, according to the park.
Among those responding to the blaze are personnel from Big South Fork, the Obed Wild and Scenic River and the Danile Boone National Forest.
Once they've finished that, they'll begin "burning out" about 600 acres aimed at containing the present blaze, according to the release.
"Access to the fire is largely limited to existing road and trails due to the steep and rocky terrain, and fuel loadings limit access," according to the park.
According to the park, Station Camp Road is closed at the horse camp turnoff.
"Also, Big Island Loop Trail is closed, where it crosses Big Island Road, all the way to the river due to active fire along portions of the trail."