Before the Hatch

THE DRIFT · FIELD DISPATCH · PRE-DAWN

The hatch has not started yet. The sky is the color of graphite and the thermometer reads 41 degrees and the river is making the sound it makes before anyone else is listening to it. The sound is specific: water moving over particular rocks at a particular volume, a low conversation that has been going on all night and will continue long after you have left. You are here early enough that the fish have not been disturbed by another angler this morning and neither have you.

There is a case to be made that the hour before the first hatch is the most important hour of the day on any trout water. The fish are positioned. The water temperature is climbing toward the range where surface feeding becomes likely. The light is coming from one direction only and it has not yet reached the angle that causes fish to spook at the sight of a rod flash. If you have been watching how the water moves since you arrived, you know where three fish are holding without having cast a single time. You could fish blind. You could also wait.

Waiting before you fish is a skill that fly fishing rewards disproportionately and that most anglers never develop. The urgency of being on the water competes with the patience that the water requires. The standard compromise is to arrive, assemble the rod, tie on a reasonable fly, and begin casting before you have watched anything. The fish you caught in the first ten minutes of that approach were fish you could have caught in any ten minutes; the fish you would have caught if you had spent those ten minutes watching were the specific ones that you have been thinking about since.

Before the hatch, the nymph is the instrument. A two-nymph rig under an indicator, sized to the depth and current speed of the specific run, drifted through the hydraulic shadow below the riffle where you watched a fish nose up twice in the last six minutes. The strikes before a hatch are subsurface, deliberate, and harder to detect than rises. The indicator dips instead of disappearing. Set the hook with a lift, not a sweep, and keep contact with the fish immediately. On a river like the Madison, the pre-dawn nymph hour consistently produces the largest fish of the day, fish that will not show themselves again until the hatch is on and every angler on the water is casting to them.

The first fish of a hatch does not rise the way you expect. There is no flourish. A trout that has been feeding on nymphs two feet below the surface adjusts its position incrementally as surface food appears, and its first rises are hesitant: a look, a turn, a refusal. Then a sip so subtle that you question whether you saw it. Then another. The window between the first rise and the peak of the hatch is when the best fishing happens, before the river is covered in rings and every fish on every flat is competing for flies. In that window the fish are committed to the surface but not yet overwhelmed by food; they will move for a well-presented fly and they will not refuse it because of imperfect pattern selection.

The light is changing. A shaft of it has come over the ridge to the east and found the rifle above you and the surface is beginning to show the dimples. The BWO hatch has started and the thermometer now reads 47 degrees. You have been on the water for forty-five minutes. You have not cast once. You know where four fish are, what they are eating, what size fly they are likely to take, and exactly how the current will affect your presentation from the position you selected before the light arrived. You were not waiting. You were preparing.

This is the drift. Not the fly on the water but the hour that precedes it: the cold, the quiet, the attention paid to a piece of water before anyone asks it for anything. Every great cast you will ever make begins in this hour, in the observation that precedes it, in the decision to wait.