15. When to use a two-handed rod. (15 of 20)
In big water where it's a struggle to get your fly into position because you can't wade deep enough, or you want to cover more water in a single cast without struggling to make long casts, a two-handed rod makes longer casts and drifts much easier. These rods run from 11 to 13 feet long. The shorter, lighter rods are good for moderate rivers where you don't need really heavy sinking heads to get down.
In very large rivers a 13-foot rod or longer will make it easier to cast longer distances, and these bigger rods will support casting extremely heavy sinking heads.