A lightning-caused fire that has been burning in the backcountry of Yellowstone National Park since early September has grown to an estimated 3.3 square miles.
Park officials say the fire is about 10 miles west of Fishing Bridge and two miles south of Hayden Valley in the central portion of the park. Smoke is visible throughout the park.
Crews monitored the fire by air and from lookout points on Monday, but no facilities, trails or roads are threatened and park officials are letting the fire burn. The burn area was last measured on Sunday afternoon.
Officials say overall fire activity increases in the afternoon as temperatures and wind speeds rise and relative humidity levels drops.
The fire danger in Yellowstone National Park is rated “high.” Campfires are only allowed in designated grills in park campgrounds, some picnic areas and specific backcountry campsites.