Idaho, circa 1989. Using the family campsite as a basecamp, a highschool friend of mine and I set out with packs to forge a river and head up a nearby mountain to camp on our own. We were on the South fork of the Boise river. We climbed the mountain for a few hours and got about half way up it (we had thought we might reach the top, but didn't even come close). The weather was excellent, clear, and warm. So we used foam bed rolls, and bags. No tent. We awoke about 2am to the sound of something large circling our position and not happy about our presence. It was knocking down trees around us. We got the nerve to try to light up the area with flashlights, but the trees were dense, and the light couldn't go far enough to see anything. The sounds persisted for a few hours, and we lay there silently awake for about 3 hours until first light. As soon as there was enough light to move, we grabbed our stuff and quickly went straight down the mountain. We never saw the animal, nor did it make a distinct enough noise to identify it (some huffs and grunts, but vague). From knowledge of the area, and the behavior, my guess is that it was a brown bear, and we just happened to have plopped down right in its range. I was 15.