A nearly 100-acre wildfire was burning Thursday in a remote section of Olympic National Park in Washington state, with air and ground resources called in to try to contain it.

The Mount Tom Creek Fire was reported by backpackers on Wednesday. Park officials believe it was ignited by a lightning strike the day before.

"The fire is burning on a steep, densely forested slope approximately 5 miles west-northwest of Mount Olympus. The Hoh Rain Forest administrative site is approximately 6 miles from the fire perimeter. The Hoh Rain Forest Visitor Center, campground, and trails are currently open to the public," a park release said.

Due to increased fire activity and dry vegetation, Olympic National Park implemented fire restrictions Thursday. Dispersed and backcountry fires were prohibited, while fires within established metal fire rings in developed campgrounds and picnic areas were exempt from this prohibition. Propane and gas stoves are allowed, if operated at least three feet away from flammable vegetation and forest litter.