Firefighters from Bridger-Teton National Forest, Grand Teton National Park and Yellowstone National Park are joining efforts to suppress a fire that flared up Monday afternoon near the South Entrance of Yellowstone. The Snake Fire is located three miles east of the entrance station and on the boundary between Yellowstone and Bridger Teton National Forest, and is now estimated to involve 40 acres as opposed to the larger acreage first thought. The cause of the fire is still under investigation but it is believed it was a hold-over from a previous lightning strike. A Type 3 helicopter has beeen ordered in from the Black Hills of South Dakota to support firefighting operations. Some trails and backcountry campsites near Yellowstone’s South Entrance have been temporarily closed.