One of the problems with early season trout fishing in most waters is the problem with spring run-off. This is a particularly thorny problem in many parts of the west, especially in those years when the snow pack is deeper than normal. Streams can be high, cold and dirty for weeks, and even lakes can be affected from the steady influx of dirty cold water. For a fly fisherman that has waited all winter for a chance to wet a line an extended spring runoff can be excruciating.