5/31/2026: Madison River Fishing Report

Summary

The Upper Madison is fishing well after a cold front cleared the water, with clarity stabilizing around 3 ft and that classic green tinge through the productive Quake-to-Lyons wade zone. Flows are extremely low for late May, so it's mostly a small-bug nymph game up high and a dry-dropper game on the lower river. Northwestern Energy is holding Hebgen near full pool, so a release bump in the next two to three weeks is plausible and would reshape everything.

At a glance: Hebgen outflow 449 cfs (Slide Inn, 5/24), Northwestern Energy still holding water to fill Hebgen (94.2% full, ~1.8 ft from full pool) | Kirby 684 cfs | Varney 904 cfs (Slide Inn, 5/24) | Visibility ~3 ft+ with a green tinge on the Upper; West Fork and Indian Creek may dirty it shortly | Floatable top to bottom in a hard boat, but painting rocks through the Flats and from 8 Mile down to Town, flows extremely low for the date

The Upper Madison is fishing well after the cold front cleared the water late last week, clarity has stabilized around 3 ft with that classic green tinge, and the wade stretch between Quake and Lyons is the productive zone. Flows are extremely low for late May, which means the lower river down by Ennis is technically floatable but rocky, and most of the action is in the small-bug nymph game. Northwestern Energy keeps holding back at Hebgen to top off the reservoir, at 94.2% they're within a couple feet of full pool, so a release bump to match inflow is plausible in the next two to three weeks. That bump will reshape everything.

The hatch story is a Baetis-and-midge show up top on the cloudy days, with caddis and a handful of PMDs starting to show on the lower river near town. Pods of risers are around for patient anglers willing to lengthen the leader and downsize tippet, refusals are still coming from line diameter, not pattern choice.

Best techniques

• Nymphing, the bread-and-butter. In the upper wade (Quake to Lyons), run small bugs: BWO nymphs, small caddis larva, small perdigons like the Spanish Bullet and assorted Dips. Down low by Ennis the fish are still keying on larger profiles, rubber legs and worms, so trail a small bug behind a stone. If the bobber rig stalls, switch to a dry-dropper and work shallow banks that haven't been pressured. B to BB shot to get down.
• Dries, small window. Best opportunities are on cloudy days. BWOs up high; caddis and a few PMDs near town. When in doubt, commit to a smaller attractor like a Micro Chubby and keep moving, pick the right water and you'll get shots at nice fish on the dry.
• Streamers, decent, not great. Better in the upper and lower wade than the float. Below Lyons has produced. Lean on small sculpin profiles: Peanut Envys, Mini Dungeons, Mini Whiteys, CH Barely Legals. MRFC's note from late April still rhymes, natural whites and blacks have been the favorites. Expect the strip bite to step up once flows lift and put a little color back in the water.

Hatches

The Fly Box

Nymphs: Spanish Bullet, zebra midges, Three Dollar Dip, Olsen's Hare's Ear Blowtorch, Pat's Rubber Legs

Dries: Antonio's Adult BWO, Mini Hot Mayfly, Parachute Adams, Johnson's Mimic May BWO

Streamers: Peanut Envys, Mini Dungeons, Barely Legals, Jiggy Pine Leech, Lil' Kim, Woolly Bugger, Sparring Partner

Midges: zebra midges, Three Dollar Dip (brown)

BWO nymphs and emergers: BH Pheasant Tail, Spanish Bullet (French), Olsen's Hare's Ear Blowtorch, small olive perdigons

BWO / mayfly dries: Antonio's Adult BWO, Mini Hot Mayfly (Black, Garcia Yellow), Parachute Adams, Johnson's Mimic May BWO

Caddis / PMDs (lower river): caddis on the sun breaks; a few PMDs starting near town

Stones and worms (float / lower river): Pat's Rubber Legs (black)

Outlook. Watch Hebgen. With the reservoir within ~2 ft of full pool, a release bump to match inflow is the next inflection, most likely in the next two to three weeks. When it comes, expect bigger nymph profiles (stones, worms, cranefly larva) to take over and the streamer bite to improve as color returns. Until then, it's a small-bug, slow-water nymph game up high and a dry-dropper game on the lower river. Snowpack is running below average, so this may be a Madison-friendly summer, fishable longer, with less of a runoff blowout, but it also means less push behind the river all season.

Sources and Thanks

Shop	Report date	Coverage
Madison River Fly Fishing Company (Ennis)	April 23, 2026	Madison River
Slide Inn (Galloup's)	May 24, 2026	Madison River