Voices in Spokane County, Washington

I just found this website so I am going to tell you about an incident that happened several years ago. I was about 14 years old and in the Boy Scouts. My troop was from Portland, Or., and we were attending a Boy scout summer camp near Spokane somewhere....I can't remember the exact name of the camp...but it was near Spokane. The different troops lived in various campsites ringed around a lake and a main lodge. My troop had one of the furthest campsites from the lodge and the lake. During the daytime, our campsite was normally empty. For the first few days everything was fine and then things started coming up missing and evidence that someone had been going through our belongings was evident. Needless to say, one morning I woke up and felt sick. I was given permission to stay in my tent and rest while everyone else left and partook of the morning festivities. Well, I was resting in my tent and thinking about what would happen if the thing or person going through our camp showed up while I was there alone. Then in the distance I heard the voices of boys from my troop making there way back to camp. One boy was in the lead of the group and just about back into our camp when I heard him yell "Hey, what are you doing?" I knew I was the only person in camp and I was not visible as I was in my tent...I darted out of my tent and looked down the trail to my right and saw my troop mate...then something flashed by to my left. It was upright on two feet and all I can really say is that it was large and brown. At the edge of our camp it darted into the brush and proceeded up a small incline. Whatever it was moved with incredible speed and ease through this thick underbrush. It stopped at the crest of the hill and looked back at us....Then we being young and dumb started into the brush...and it turned and disappeared. I am not sure what I saw...I do know it was in two legs and moved quicker than any human I have ever seen, through some very, thick brush.