The Clark Fork is getting a welcome September reboot after Labor Day’s cooler, wetter weather, with Kingfisher Fly Shop reporting flows above Missoula hovering around 1,200 cfs, as of September 8, 2026. It’s still a skinny, technical river, but cooler water, clouds, and a little extra flow have trout looking more comfortable in riffle edges, foam lines, soft banks, green seams, tailouts, side channels, and inside bends. The best strategy is to let the river show its cards before you start throwing them: “If fish are up, smaller dries and clean drifts are the move.” Hoppers, ants, beetles, PMD spinners, caddis, and increasingly BWOs are all worth carrying, with October Caddis, Mahogany Duns, and Hecubas beginning to join the early-fall menu. If the surface looks like an empty dance floor, switch to small nymphs under a terrestrial or indicator. One important heads-up before launching: “Weigh Station to Sha-Ron float is closed until October 31st.”
The forecast is doing anglers a favor, too, with cooler temperatures, clouds, and some rain potentially stretching the productive fishing window deeper into the day. Streamers deserve some attention as fall starts knocking on the door, particularly around banks, shelves, soft seams, and inside bends, though there’s no need to unleash the giant meat locker unless the river picks up some color. As the report puts it, “Cloud cover, rain, and a little color can get bigger fish looking for a meal.” For the fly box, think Chubbies, Water Walkers, Parachute Adams, Frenchies, Perdigons, Pheasant Tails, caddis pupae, Sparkle Minnows, Mini Dungeons, Sculpzillas, Thin Mints, and Woolly Buggers. This report comes from Kingfisher Fly Shop, 926 East Broadway, Missoula, MT 59802. Call: 888-542-4911.
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