Cub River
river in Idaho
Nestled in southeastern Idaho, the Cub River is a delightful freestone stream winding through picturesque canyons and meadows. It offers a more relaxed fly fishing experience compared to larger, busier waters, with good populations of cutthroat, rainbow, and brown trout eager to take well-presented flies.
Conditions right now
No USGS gauge is linked to this water yet, so we can't chart flows.
What's working on Cub River
- 01Blue-Winged Olives (BWOs) and Pale Morning Duns (PMDs) are the most prominent hatches you'll encounter in October, particularly on cloudier days.
- 02The Cub River should be seeing the tail end of the substantial October Caddis hatch, making adults a viable target for rising trout.
- 03Midges are a year-round staple and become increasingly important as water temperatures cool.
- 04Fall is spawning season for some trout species, so egg patterns will also be highly effective for opportunistic feeders.
- 05Focus your efforts on the deeper runs, current seams, and the heads and tails of pools where trout tend to congregate in the cooler fall water. Look for slower, calmer pockets for rising fish during hatch windows. Access near Willow Flats Campground typically offers good walking access to prime fishing spots.
- 06With potentially lower and clearer fall flows, focus on a stealthy approach. Employ long leaders and fine tippets, especially when fishing dry flies or emergers to the more selective Cutthroat and Rainbow Trout. For nymphs and streamers, dead-drift them through likely holding water or use a slow, subtle retrieve to imitate lethargic prey.
Past reports week by week
1 weeksWhat to tie on
Picked from reports, hatches and the season. Tap a fly for the recipe and where else it works.
Blue-Winged Olive (BWO) Comparadun
Blue-Winged Olives are actively hatching in early fall, especially on overcast days, making this low-profile dry fly excellent for selective trout feeding on emergers and adults.
Buy at AmazonOlive Woolly Bugger
This classic streamer is excellent for imitating baitfish and leeches in the cooler water of fall, enticing predatory strikes from all species of trout in the Cub River.
PMD (Pale Morning Duns)
Pale Morning Duns are actively hatching in fall on many Western rivers, providing a key food source for opportunistic feeders like Cutthroat, Rainbow, and Brown Trout.
Flashback Hare's Ear Nymph
An excellent general searching nymph year-round, this pattern effectively mimics various active mayfly nymphs that are a consistent food source in the Cub River during the fall.
October Caddis (Dry)
The October Caddis is one of the largest caddis hatches of the year in many Western rivers during the fall, making this a prime pattern for enticing aggressive strikes.
Buy at AmazonTungsten Bead Pat's Rubber Legs
This heavy stonefly nymph is crucial for getting deep in the current and imitating large dislodged insects, providing a substantial calorie source for trout in the Cub River during fall.
Buy at AmazonBlack Woolly Bugger
A versatile streamer, the black Woolly Bugger effectively imitates leeches and sculpins that are active in colder fall waters, provoking strikes from aggressive Cutthroat, Rainbow, and Brown Trout.
Blood Dot Egg
Fall is spawning season for some trout species, and egg patterns are highly effective for opportunistic Cutthroat, Rainbow, and Brown Trout feeding on dislodged eggs.
Buy at AmazonWhere to fish and who to ask
Forest Road 406 Access
Multiple points along the road that follows the river.
Get Cub River reports by email
Save this water and we'll email you a weekly summary of conditions, hatches and what's working.
Idaho season by season
What changes on the water through the year, with the flies for each season.
Read before you go
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Best Fly Fishing Waders of 2025 – Breathable vs. Neoprene
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Fly Fishing Pack vs Vest: Which Setup Is Right for You?
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Best Fly Fishing Sunglasses: Lens Color & Polarization Guide
Master lens color selection and polarization technology for superior vision and fish detection on the water.
Fly Fishing Nets – Rubber vs. Nylon & Why It Matters for Fish
The net you choose dramatically impacts fish survival. Here's why rubber nets are superior to nylon for catch-and-release success.
Quick answers
Common questions about Cub River.
What flies work best on Cub River?
Our top scored fly patterns for Cub River right now are Blue-Winged Olive (BWO) Comparadun (80% confidence), Olive Woolly Bugger (80% confidence), PMD (Pale Morning Duns) (80% confidence). These picks are scored from recent fishing reports, hatch data, and seasonal patterns.
What fish species are in Cub River?
Cub River holds Cutthroat Trout, Rainbow Trout, Brown Trout. See the species links on this page for fly recommendations and seasonal behavior for each.
Is Cub River fishing well right now?
We publish a fresh bite report for Cub River each week based on recent on-the-water intel. The current report — with conditions, hatches, and what's producing — is on this page.