If you plan on going boating in this part of the county your best bets are going to be the upper Hillsborough river and Lake Thonotosassa. There are other smaller places that you can get a boat in the water too.
The upper Hillsborough River, above the spillway, is where a large portion of our local water is sourced. It is a very scenic river and there are places that can accommodate water sports. If you have a kayak, throw it in anywhere and enjoy a nice paddle. If you have a full sized boat, be advised that as you travel up river it gets progressively more difficult to navigate safely.