Yellowstone Lake. It's a big'un. I apologize for what looks like a wave in the middle of the picture. It was windy, I was tired and I didn't do a good, easy sweep for the pano pic.
If you click and zoom, you can see the other side of the lake. Not much activity on it boat wise, however.
I did note that they (Wyoming and Feds) have mandatory inspections of ALL motorized floating boat-type vessels prior to putting in the water. Not that you would be pulling a motorboat/jet ski with your Harley, it's a good thing to know if you drive the Super Duty up there pulling your favorite watercraft. Be prepared....no two strokes allowed of ANY sort (no wheels, two wheels or, if you drive an old Citroen, 4 wheels)....