A loud, unknown vocalization startles solo hiker on shore of Goat Lake witnessed in Snohomish County, Washington

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Vocalization at close range with no actual sighting. Sunning at end of lake where the trail becomes brushy. Suddenly without any other sign/signal of someone/something being there, there was a loud vocalization starting with a low pitch howl increasing to high pitch howl almost ending in a high pitch hoop sound. Then dead silence. I jumped up and couldn't see anything but from the lakeshore the trail was pretty obscured and the woods thick. Sound was very close- I estimate 50-75 feet at most. I grabbed my belongings and got out of there fast hiking all the way back to my truck without stopping except to look back and listen a few times briefly. Beyond spooky, and puzzling. I have listened to many animal recordings online and nothing native to or not native to WA state sounds even close to this. It does sound strikingly similar to a couple of the recordings I have listened to on the website. I have no doubt I heard something that day that is outside of what species we know to exist in t...