I don't know if this counts as creepy, but back in the 90's I was backpacking in the Olympic Peninsula for a couple weeks with my cousin and came across something slightly disconcerting. We were on about day 5 and decided to do a day hike from our camp up to Claywood Lake, which is a small lake in the summit of Mount Claywood. The climb up was an adventure on its own, but as we neared the top we started hearing some deep banging. As we crested the ridge we saw a wonderful snowfield sloping down to a decent sized beautiful frozen lake.

On the far side of the lake about 2/3rds of the way up to the far crest, there was what appeared to be a very tall humanoid who was picking up rocks the size of beachballs, holding them over its head, then throwing them down the slope. The rocks made loud banging noises, then disappeared into the frozen lake. We saw two more rocks thrown, then the figure went up the incline with a few quick strides, went over the crest, and was gone.

When we made it over to the far side of the lake we saw the holes in the ice the large rocks made, but unfortunately up where it was standing was all shale so there were no tracks we could find. I guess it could have just been a very tall hiker dressed all in brown that decided to throw some rocks, but I've never seen a person move like that, especially considering how quickly and effortlessly they went up a shale incline that was steeper and more difficult then we thought once we got there.

I was never a person who thought Sasquatches exist, but my cousin and I were both a bit shook and didn't stick around long before heading back to base camp. After talking it over around the fire that night, we both agreed what we had experienced was inconclusive, but rumors and legends might come from somewhere...