Matching the Hatch When Nothing Is Hatching

Every fly fishing book teaches you to "match the hatch." Almost no book teaches you what to do for the 80% of the day when there isn't one.

Here's the framework we use.

Default to attractor nymphs in the top half of the column

When trout aren't keyed on a specific bug, they're opportunistic. They hold in feeding lanes and eat whatever drifts by that looks like food. Your job is to put something edible-looking in the lane at the right depth.

A two-fly nymph rig under an indicator, with one attractor (Pat's Rubber Legs, Prince, Perdigon) and one smaller bead-head (Zebra Midge, Pheasant Tail, Frenchie), covers most rivers most of the time.

Let water temperature pick your dropper size

• Under 45°F — go small (size 18–22) and slow. Cold-water trout sip; they don't chase.
• 45–60°F — size 14–18 is the sweet spot.
• 60°F and up — go bigger and faster (size 8–14 streamers and stones), especially mornings and evenings.

Use the season to pick a default top fly

You don't need to know the exact hatch to be close:

• Early spring — BWOs, midges, and small stoneflies
• Late spring — caddis and PMDs
• Summer — terrestrials (hopper, ant, beetle) and tricos
• Fall — BWOs again, October caddis, and streamer eats from pre-spawn fish
• Winter — midges, midges, midges

When in doubt, downsize

The single most reliable adjustment when nothing is working: drop a size and lengthen your tippet by a foot. Pressured trout almost always refuse for one of those two reasons before they refuse for fly pattern.

Fish Tech's fly recommendations bake season, water temp, and recent reports into a short list per river — but the framework above will get you most of the way there with a fly box and a thermometer.