It's not unusual for find piles of stones marking the way for trails across open terrain in mountains, deserts and terrain otherwise devoid of easily recognizable landmarks, but these "cairns" can evoke a surprising amount of controversy both in an out of national parks. Sometimes, however, what appears to be a cairn is actually instead an item of historic interest.

Earlier this month Yellowstone National Park officials issued a release warning that grizzly bears very possibly would be active in their search for food this fall and humans should be especially alert. Well, it seems the bears took that message to heart.

So habituated to human visitors are mountain goats at Glacier National Park that they can seem as docile and innocent as sheep. To better understand exactly how habituated mountain goats have become to human invasions, the park and the University of Montana are studying how the goats are affected by people, trails, and roads in the Logan Pass area.

A newly married bride has been accused of pushing her husband to his death off a cliff in Glacier National Park.