West Branch Union River
river in Maine
The West Branch Union River, in Hancock County, provides a diverse angling experience away from the crowds. Its cold, clear waters support populations of native brook trout, introduced brown trout, and migratory landlocked salmon, particularly in the sections influenced by Green Lake. The river offers a mix of riffles, pools, and runs suitable for various fly fishing techniques.
Cool
- 01Cool, overcast conditions with light winds; USGS flow data currently unavailable.
- 02Active hatches of Blue Winged Olives (#18-20), Slate Drakes (Isonychia) (#12-14), Tan Caddis, and October Caddis.
- 03Recommended flies: Blue-Winged Olive (BWO) Comparadun, Flashback Baetis Nymph, October Caddis (Dry), Blood Dot Egg, Black Ghost Streamer.
- 04Focus on deeper, slower pools, current breaks, structure, and undercut banks.
Past reports week by week
3 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
Matches the active fall BWO hatches, which are common on overcast days and provide consistent dry fly action for selective feeders.
Buy at AmazonIsonychia Dun
Matches the active Isonychia (Slate Drake) hatch that occurs in the fall, providing a larger dry fly opportunity for rising trout and salmon.
Flashback Baetis Nymph
Effective for targeting trout and salmon feeding on the subsurface nymph stage of Blue-Winged Olives, which are highly active in the fall.
October Caddis (Dry)
Imitates the adult October Caddis, the largest caddis hatch of the fall, which can trigger aggressive surface strikes from opportunistic feeders.
Buy at AmazonBlood Dot Egg
Essential for fall fishing, mimicking salmon and trout eggs, a crucial food source for Brook Trout, Brown Trout, and Landlocked Salmon during their spawning season.
Buy at AmazonBlack Ghost Streamer
A historically effective and locally recommended streamer pattern for migrating Landlocked Salmon in Maine, also appealing to aggressive trout.
Pheasant Tail Nymph
A versatile and consistent producer, mimicking various aquatic insects, particularly effective for trout and salmon feeding on active mayfly nymphs subsurface.
Buy at AmazonOlive Woolly Bugger
A classic streamer that imitates leeches and baitfish, excellent for enticing aggressive strikes from trout and salmon, especially when stripped through deeper runs.
Where to fish and who to ask
Ellsworth Falls
Area near the falls and dam, often holding migratory fish and providing good public access.
Green Lake Outlet
Below Green Lake, this section is known for good salmon and trout fishing due to consistent coldwater flows.
Mariaville Road Access
Various roadside access points along Mariaville Road, allowing anglers to explore different stretches of the river.
Fly shops within 40 miles
Mainely Outdoors & Mainely Flies
Annika Rod and Fly
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Maine 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.
How to Pick the Right Fly Rod Weight for Any Situation
Master fly rod weight selection with expert guidance on matching rod power to fish species, water conditions, and fishing techniques for optimal performance.
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.
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.
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 West Branch Union River.
What flies work best on West Branch Union River?
Our top scored fly patterns for West Branch Union River right now are Hendrickson Nymph (80% confidence), Parachute BWO (80% confidence), Elk Hair Caddis (80% confidence). These picks are scored from recent fishing reports, hatch data, and seasonal patterns.
What fish species are in West Branch Union River?
West Branch Union River holds Brook Trout, Brown Trout, Landlocked Salmon. See the species links on this page for fly recommendations and seasonal behavior for each.
Is West Branch Union River fishing well right now?
We publish a fresh bite report for West Branch Union River each week based on recent on-the-water intel. The current report — with conditions, hatches, and what's producing — is on this page.