Dearborn River
river in Montana
The Dearborn River offers a more secluded and challenging fly fishing experience, especially for those who enjoy wade fishing smaller freestone streams. It's characterized by clear water and good hatches, holding healthy numbers of wild brown and rainbow trout, making it a rewarding destination for technical anglers.
Conditions right now
No USGS gauge is linked to this water yet, so we can't chart flows.
October Caddis are making a significant appearance
- 01October Caddis are making a significant appearance, offering excellent dry fly opportunities.
- 02Blue-Winged Olives are actively hatching, requiring delicate presentations with low-profile dry flies.
- 03Mahogany Duns are beginning to emerge, adding another key fall dry fly option.
- 04Terrestrial patterns like Hoppers and Chernobyl Ants are still drawing strikes, especially during warmer parts of the day.
- 05Subsurface activity remains strong with nymphs and streamers imitating larger baitfish or stoneflies.
Past reports week by week
9 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
Regional reports confirm active fall BWO hatches, making this low-profile dry fly excellent for selective trout.
Buy at AmazonOctober Caddis (Dry)
Regional reports indicate strong October Caddis activity, a prime fall food source for opportunistic feeders.
Buy at AmazonMahogany Dun
Regional reports highlight the beginning of fall Mahogany Dun hatches, an important dry fly opportunity.
Buy at AmazonHopper
Mid-September regional reports show terrestrial fishing remains strong; hoppers are still a valid food source in early October.
Chernobyl Ant
Regional reports mention Chernobyl Ants alongside strong terrestrial fishing in mid-September, making them a good large attractor for early October.
Buy at AmazonWoolly Bugger (Olive)
A versatile and reliable fall streamer, effectively imitating leeches and baitfish for aggressive trout in cooling waters.
Zebra Midge
Midges are a consistent food source year-round, proving effective when other hatches are sparse or fish are keyed on smaller subsurface prey.
Buy at AmazonPat's Rubber Leg
An excellent heavy stonefly nymph for prospecting deeper runs and getting down to feeding fish in fall conditions.
Where to fish and who to ask
Dearborn Fishing Access
Primary public access point for the river.
Tower Rock State Park
Nearby natural landmark with some fishing opportunities.
Fly shops within 40 miles
CrossCurrents Fly Shop
The Trout Shop
Get Dearborn River reports by email
Save this water and we'll email you a weekly summary of conditions, hatches and what's working.
Montana season by season
What changes on the water through the year, with the flies for each season.
Read before you go
Winter Fly Fishing: Essential Cold Weather Tips & Tactics
Master winter fly fishing with proven cold weather strategies, gear selection, and tactics for catching trout when temperatures drop.
Fly Line Types Guide: WF, DT, Running & Shooting Heads
Master fly line selection with our comprehensive guide to weight forward, double taper, running lines, and shooting heads for every fishing situation.
Best Fly Fishing Waders of 2025 – Breathable vs. Neoprene
Expert comparison of breathable and neoprene waders with top 2025 models for every budget and fishing condition.
Felt vs. Rubber Sole Wading Boots: What's Legal Where
Essential guide to felt vs. rubber sole wading boots, plus state-by-state regulations to keep you legal on the water.
Fly Fishing Pack vs Vest: Which Setup Is Right for You?
Compare fly fishing packs and vests to find the perfect gear setup for your angling style and fishing conditions.
Best Fly Fishing Sunglasses: Lens Color & Polarization Guide
Master lens color selection and polarization technology for superior vision and fish detection on the water.
Quick answers
Common questions about Dearborn River.
What flies work best on Dearborn River?
Our top scored fly patterns for Dearborn River right now are Blue-Winged Olive (BWO) Comparadun (95% confidence), October Caddis (Dry) (95% confidence), Mahogany Dun (90% confidence). These picks are scored from recent fishing reports, hatch data, and seasonal patterns.
What fish species are in Dearborn River?
Dearborn River holds Brown Trout, Rainbow Trout, Westslope Cutthroat Trout. See the species links on this page for fly recommendations and seasonal behavior for each.
What are current flow conditions on Dearborn River?
Live USGS streamflow readings for Dearborn River are charted in the sidebar of this page and updated automatically from the nearest gauge.
Is Dearborn River fishing well right now?
We publish a fresh bite report for Dearborn River each week based on recent on-the-water intel. The current report — with conditions, hatches, and what's producing — is on this page.