Hunter hears guttural scream while on overnight hike outside of Oroville witnessed in Okanogan County, Washington

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I am new to hunting but I have spent my whole life hiking in the woods. This potential incident happened on a deer hunt. After seeing a herd of does, I found a buck trail leading uphill. I followed the buck trail trying to find sign like, feces or tree marks. I would come across some fresh buck feces every hundred yards up the saddle between Chopaka and Hurley mountain. I saw buck sign everywhere, I marked it with a buck tarsal scent gland from a fresh deer kill from my friend. I continued following the buck trail and signs up some very steep country with lots of boulders and dangerous rock fields. I finally found and spooked whatever I was following; I never saw it but it stormed off over a rock field before I could get sight of it to shoot. I am assuming it was a buck or sheep or mountain goat. The fresh deer sign ended here and I decided to continue up, following old deer sign and camp. It got very, very steep; I climbed approximately 2000 foot of gain to about 3/4 of the way up the...