As fall cools a smallmouth river and the topwater bite fades, the fish drop to the bottom third of the water and feed mostly on crayfish and baitfish. The most reliable fall fly selection is a small set of natural crayfish patterns in olive, brown, and rust, sizes 8 to 1/0, paired with baitfish streamers in white, chartreuse, and yellow. Match the crayfish flies to the ones actually in your river and fish them slow along rocky bottoms as the water drops through the 50s and 40s.
Fall Crayfish Flies for Smallmouth
Crayfish anchor the fall menu because of the molt. The stream crayfish in most smallmouth rivers, the genus Faxonius, run a synchronized mass molt and mating period in fall: freshly molted crayfish are soft and defenseless, and mating adults move out across open rock, which puts a lot of easy prey in front of the bass.
Clouser’s Crayfish (Bob Clouser) is the reference weighted craw, riding hook-point-up and crawled along the bottom. The Near-Nuff Crayfish, from the late Dave Whitlock, is a durable generalist in size 8, olive and tan. Ryan’s Soft-Shell Crayfish matches the pale, freshly molted animal during a molt. A heavily weighted Woolly Bugger or Clawdad in brown, rust, or olive does a lot of crayfish work on its own.
Lean on natural olive, brown, and rust rather than bright orange, and add a pale tan or cream for the soft-shell look. Fall crayfish often run 1.5 to 3 inches, so size 8 to 1/0 covers most water. Turn a few rocks and match the color and size you find.
Baitfish Streamers for Cooling Water
This year’s baitfish, the young-of-year hatched in spring, reach their peak size in fall, then school up tightly and slow down as the water cools. Smallmouth corral these schools against structure, current seams, and the mouths of creeks and tributaries, where cooler inflow pulls in bait.
The Clouser Deep Minnow (Bob Clouser; named by Lefty Kreh) is the baseline baitfish fly. Size it to the local forage and vary the eye weight to reach the depth you need, in white and chartreuse or natural shiner and dace tones. Blane Chocklett’s Game Changer in yellow and white is a cited fall favorite, and a conehead Woolly Bugger covers the small-to-mid streamer range along rocky drops. Strip a baitfish fly up to a drop-off, then kill it and let it dead-drift over the edge, where a following fish usually eats.
How Water Temperature Changes the Fall Bite
Early and mid fall, with water in the 60s and upper 50s, is the feed-up: fish push onto gravel flats and creek mouths to chase minnows, best in early light. As the water slides into the low 50s and 40s, the bite tapers and eating windows shorten, often to the midday warm-up. One river study found smallmouth stomachs holding food dropped from 93 percent in spring to 26 percent in winter, so late-fall fishing means slowing down and fishing deeper for fewer but often bigger fish.
Crayfish patterns keep producing into cold water, because the stream crayfish of a rocky river stay active rather than burrowing off for winter. Fish a floating or sink-tip line with a 9-foot leader for weighted crayfish flies along the rocks, and an intermediate or sinking line to give baitfish streamers a better swimming action.
For a starter kit, carry a natural Clouser’s Crayfish and a soft-shell pattern in olive and tan, plus a Clouser Deep Minnow and a yellow-and-white Game Changer, and fish them slow and near the bottom as the water cools.
Frequently Asked Questions
What flies do smallmouth eat in the fall?
Fall river smallmouth feed mostly on crayfish and baitfish near the bottom. Effective flies are natural crayfish patterns like Clouser’s Crayfish and the Near-Nuff Crayfish in sizes 8 to 1/0, plus baitfish streamers like the Clouser Deep Minnow and Game Changer.
What color crayfish fly is best for fall smallmouth?
Natural olive, brown, and rust are the most reliable fall crayfish colors, with a pale tan or cream option for freshly molted, soft-shell crayfish. Bright orange is overrated for fall; match the color of the crayfish actually in your river by turning a few rocks.
Do smallmouth still eat crayfish in cold water?
Yes. The stream crayfish that dominate most smallmouth rivers do not burrow and hibernate; they stay active down into the 38-to-44-degree range, so crayfish flies keep producing into late fall and often to ice-up.
What size flies for fall river smallmouth?
Size 8 to 1/0 covers most fall situations. Crayfish patterns in the 1.5-to-3-inch range match fall naturals, and baitfish streamers should be sized to the young-of-year forage in your river, which is at its peak size in fall.
What fly line is best for fall smallmouth streamers?
Use an intermediate or full-sinking line to give baitfish streamers a swimming action, and a floating or sink-tip line with a 9-foot leader for weighted crayfish flies fished along rocky bottoms. As water drops into the 40s, getting the fly deep quickly matters more.
