A group of 4 went to hike the thomas divide trail and we had passed other people on the trail. when we arrived at our destination it was getting dark and one of our friends went to use the bathroom and spotted lights along the opposite side of the mountain. when she called to us to come look one of the guy's said that he had heard of the light's (brown mountain light's ) and they seemed to move. on our way out we noticed more light's on the opposite side of the mountain. when we stopped to look one person yelled "what is that" we all stood silently and scared out of our minds. it first looked like it was stopped then it came closer and we all thought we heard a humming sound coming from it. it seemed to have heat waves coming from it. we tried to run down the hill but fail many times. we got back to town to tell people at a local gas station and they said they knew about the light's along the mountain but not of any ufos. we were told to go to the thomas divide lookout where there were two car's and everyone had been watching the light's since dark. we asked if they had seen anything else they said a plane came directly over where we had been but no ufo in the sky.