Boater spots something odd during the day on Lake Shasta witnessed in Shasta County, California

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This happened back around 2014 although I didn't realize it until I read something about it. I was on Shasta Lake riding my Sea Doo one last time before I sold it. I had headed up the Pit river sometime in July. It was approximately sometime after 2 PM. I had gone up quite a ways up toward the pot river and had decided to head back toward Jones Valley resort. I always love to scan the ridges looking for shapes like you do when you hunt. I came around a big turn in the main channel and it was the most bizarre thing I had ever seen. About 20 feet from shore I see what I initially believed to be a big hairy head with eyes staring directly at me. I would say within a couple seconds it simply disappeared under the surface of the water. I was wearing sunglasses and I remember thinking did I just see what I think I did? I gave it a wide girth and slowed down and circled the area for about 2-3 minutes. I remember feeling freaked out a bit having this vision of it lunging out of the water at me. Shortly after I continued back to Jones Valley resort and tried to put it out of my head. I wish now more than ever I would have taken the time to search for it but I just figured my initial thought had to be incorrect. I reasoned naturally it had to be something else. A beaver? Muskrat? I can't say for sure what it was but I know it was big. I do know my original feeling was it was a big hairy head and face with eyes. It had appeared to be wet already like it had already submerged previously. It was dark brown and tan in color. I know it was not a human. There were no boats anywhere near where I was and it was pretty secluded..