The East Troublesome Fire that started Wednesday in Grand County stands at 3,718 acres with 0% containment, being fueled by grasses, sage and lodgepole pine trees, officials said.
It's burning on Arapaho National Forest lands near Grimes Peak, fire officials said. That is north-northwest of Hot Sulphur Springs and northeast of Kremmling. Early Thursday morning, officials issued mandatory evacuations in the Big Horn Park area and County Road 21 north of County Road 213.
Pre-evacuation notices were sent to people living south of County Road 21 near the town of Parshall.
When the fire started on Wednesday, it stood at 391 acres. Evacuations were ordered when the new wildfire started Wednesday for people in the Bighorn Park subdivision.
Strong, gusty winds up to 45 mph helped spread the fire to the east Wednesday, officials reported. Officials said the fire is burning in an area where fire engines cannot get access.