06-25-2008, 12:19 AM
Your leader length depends more on what type of fly your fishing with, and the waters your fishing.
Typically if your nymphing you will want your leader to be 1.5 times the depth of the water.
Dries can vary much more, at times on difficult water I have fished up to a 16' leader, and other times as short as 6-8', on average about 12'.
Streamers, sometimes as short as 4', but usually around 6'.
Hope this helps....
*Comments posted above are only my opinion. I may be right....eh, I'm probably wrong. Take 'em for what they're worth.*