I have had the opportunity to ski on dozens of freshwater lakes and rivers. I have found that water skiing on a river has some very good benefits such as smooth water all the time as well as sometimes miles of travel without having to turn around. This gives the skier very long runs without having to worry about the boat turning and navigating the boat’s wake. Some of the best times of my life were had while water skiing some of my best friends. Some of my buddies would bring coolers full of beer, plenty of gas money and we would head out for the weekend to do some hard-core smooth water hunting at our favorite lake and then ski our tails off.
Of course in order to go skiing you must have access to a boat. I happened to have had a nice little ski boat that we used all the time. It was a little 1989 Bayliner 20 foot open bow which was really a great little boat for day trips and short weekends. This boat had a V-8 engine and an inboard outboard drive which had no problem pulling three skiers at one time. The top speed was up around 45 mph or 40 knots.
So if you really like the outdoors and the like water and boats I recommend skiing on water as an excellent way to enjoy the outdoors, rivers and lakes firsthand while also getting some great exercise. You can rent boats and wave runners at most recreation areas.