Bighorn River Fishing Report: Streamers, Nymphs, and Fall Trout Action

Artificial Lure coming to you with this morning’s fishing report for Friday, October 17th, right here in Big Horn, Montana and the legendary Bighorn River. Fall is holding strong with overnight lows dipping into the upper 30s, then climbing steadily back to the high 50s by the afternoon—looks like partial sun and a gentle 5–10 mph northwest breeze is shaping up to keep the fish from getting spooky but your hands needing an extra cup of coffee. Sunrise broke over the cottonwoods at 7:25 AM, and sunset will close things out around 6:20 PM, so there’s plenty of daylight for wading or drifting. There’s no tide action this far from saltwater, but river flow is what counts here. According to Montana Outdoor’s latest update, flows are running steady, water is gin-clear, and temperatures are excellent for active trout—it doesn’t get much better for fall fishing. Word through the guides and at the boat ramps is the river’s been downright generous this week. Anglers have been landing plenty of healthy brown trout in the 16–20 inch range and some nice fat rainbows up to 18 inches. You might also spot the occasional whitefish schooling up in the deeper runs. If you get out early, expect the streamer bite to be lively. Folks drifting smaller olive or black buggers, articulated streamers, and classic Zonkers have been reporting solid grabs, especially off the shelves and just inside the seams. Midday, as that autumn sun warms things up, the nymphing heats up. Scuds and sowbugs in grey or tan—sizes 16–18—have been the ticket, and the Euro-nymph crowd is doing well running tungsten beaded nymphs right along the bottom. The staple Bighorn patterns—Soft Hackle Ray Charles, root beer midges, and hot-head sowbugs—are still the go-to choices. A few late-season blue-winged olives are around, so don’t shy away from a small BWO emerger on a calm afternoon if you see noses breaking the surface. Word at the Afterbay and 3-Mile Access Sites says the browns are starting to get colored up and are aggressive—so don’t be afraid to throw bigger patterns if you’re looking for a trophy. Fresh reports out of Montana Outdoor note some solid streamer fishing at Duck Blind and the famed Farmhouse hole, both local hot spots delivering this week when the clouds rolled in and the wind laid down. For those new to the river or looking for reliable water: - Afterbay Access—consistent action, easy wading, and a shot at both browns and bows. - Farmhouse Run—classic Bighorn water, loaded with deep buckets and plenty of fish. Live bait isn’t in the cards on the Bighorn, as it’s artificial-only regulations; so pack your streamer box, tie on some fresh tippet, and don’t forget a handful of weighted nymphs for good measure. Olive and black stand out as the season’s best streamer colors, but a splash of chartreuse can sometimes turn the heads of bigger rainbows. This is prime season, folks—river’s in great shape, the crowds are thinning out, and the bite is on. Be sure to layer up for chil This content was created in partnership and with the help of Artificial Intelligence AI.