Technique · Whenever fish are looking up and the water is clear.
Dry-fly presentation
Making a fly float over a fish without the fish ever seeing the leader.
Position beats casting
On flat water, where you stand decides whether the fish sees the leader. Get below and to the side of a rising fish, cast up and across, and let the fly land a metre above the fish's window with a slack line so it arrives before the tippet does. A mediocre cast from the right position beats a beautiful cast from the wrong one.
The window is the target
A trout looking up sees a cone roughly 60 degrees wide; inside it, the surface is compressed and everything is visible. Aim to put the fly inside that cone, not on the fish's nose. On a clear chalk stream you can usually see the fish's head move as it tracks the fly, and that tracking movement is your cue to be ready rather than to strike.
Drag is the whole game
On moving water, the fly starts dragging the moment the current catches the line between rod and fly. Mending upstream, casting a curve, or simply using a longer, thinner tippet all buy you another half metre of drag-free float. On still water, drag is not a problem — on a river it is the problem.
Rivers in the ledger where this applies
White River, Arkansas
Ozark foothills below Bull Shoals Dam, Arkansas, United StatesA tailwater you fish from a boat, where the generation schedule is the tide table.
brown · rainbow · cutthroat
Apr · May · Jun · Sep · Oct · NovDavidson River
Pisgah National Forest, North Carolina, United StatesThe most accessible trout water in the southern Appalachians, and surprisingly technical.
brown · rainbow
Apr · May · Sep · OctPenns Creek
Centre and Snyder Counties, Pennsylvania, United StatesWhere the Green Drake hatch is a public event and the whole valley closes for a week.
brown · brook · rainbow
Apr · May · Jun · OctLetort Spring Run
Cumberland County, Pennsylvania, United StatesThe hardest small stream in America, and the one that invented the terrestrial fly.
brown
Apr · May · Jun · OctFarmington River
Litchfield County, Connecticut, United StatesNew England's most reliable tailwater, with a catch-and-release TMA that fishes in January.
brown · brook · rainbow
May · Jun · Jul · Sep · OctPere Marquette River
West-central Michigan, United StatesA national-forest river where fall steelhead run on autumn rain, not on a dam schedule.
brown · steelhead · rainbow
Apr · May · Sep · Oct · Nov