The trout, of course, can be caught all winter, depending on where you find them. But winter isn’t trout season, because winter isn’t the season of caddis blizzards, midnight hex runs and the clumsy flailing of grasshoppers and stoneflies the size of your pinky. Fall is where it all comes together, where the trout roll out those few final surprises. It’s never sudden, but you don’t want to blink—you just might miss it.