Take a kayaking trip on the lake. Just be sure to not use a whitewater kayak to do that. I had a wonderful idea to paddle down the whitewater river until it dumped into the lake. Only one problem, I didn't realize that I was going to be paddling 2 miles in the flat lake water with a flat bottom white water kayak. I believe I completed an Olympic workout after I made it back to the truck.
I had the coolest thing happen while whitewater kayaking. I noticed when I was getting closer to the lake from the whitewater river that I was on that trout fish were jumping everywhere. I had trout fish jumping over the front and the back of my kayak. I know had I been in an open boat they would have jumped into the boat. I was amazed to see so many trout jumping and moving up stream for spawning season.