From a press release posted today on the Glacier National Park web site . . .

Aggressive behavior has been displayed by a mountain lion in the Upper McDonald Creek Valley near areas highly frequented by visitors. Rangers are requesting visitors to be on alert for mountain lions and report all sightings to the closest National Park Service (NPS) facility.

On Tuesday June 23, a woman and her niece were confronted by an adult mountain lion, dark in color on the Sperry Trail near the Lake McDonald Lodge. The lion was crouched adjacent to the trail with its ears back when the visitors saw the lion. The visitors spoke firmly to the lion and eventually the lion left the area. On Sunday June 26, rangers received another report of a very large hiking group that encountered a mountain lion with a similar description on the Upper McDonald Creek Trail, between the North McDonald Road and the horse bridge across Upper McDonald Creek. The lion was spotted less than five feet off the trail and did not show any signs of being frightened by people.

Rangers are actively patrolling these trails and are requesting visitors to report all sightings immediately to the closest NPS facility or Park Ranger. Visitors are also reminded that unlike bears, if an attack seems imminent, act aggressively, do not crouch or run away. Park Officials advise hiking in groups and do not recommend solo travel on trails. More details on mountain lion sightings in Glacier National Park is available in the park newspaper or online at http://www.nps.gov/glac/planyourvisit/mtnlionsafety.htm.