Use the roll cast when there is no room behind you to cast. Practice this cast on the water.

  1. Hold the fly rod out in front of you and make sure there are no tangles in your fly line.
  2. Bring the fly rod tip back so that a small segment of line hangs loosely behind your casting shoulder.
  3. Move the fly rod forward gradually; slowly at first, then speed it up steadily.
  4. Stop when the rod tip is still pointing slightly upward and watch the loop unroll.

Copy from the Minnesota Department of Natural Resources Web site:
http://files.dnr.state.mn.us/recreation/fishing/fly_fishing_basics.pdf