Upper Madison River Fishing Report

Hebgen Dam to Ennis Lake

Below Hebgen Dam the river drops into Quake Lake, and from there down to Ennis Lake it runs roughly fifty miles of almost continuous riffle, the stretch anglers call the fifty-mile riffle. It is the reach most people mean when they say they are fishing the Madison, and it holds good numbers of rainbows and browns from top to bottom.

Upper Madison — Today's Report

Sunday, September 27, 2026

Live Data

Updated Sep 27, 7:03 AM MDT

Upper Madison Fishing Report

Hebgen Dam to Ennis Lake
Water Temp (Kirby) 57.4°F
Flow Rate (Kirby) 753 CFS
Water Clarity Excellent

Flows out of Hebgen are sitting at 753 cfs with Kirby reading 51.1 degrees at 5:30 this morning. Those are stable numbers, a touch low for the date but nothing that changes floatability, and the whole fifty-mile riffle from Quake Lake to Ennis is in play top to bottom. The cottonwoods along the lower valley are turning, the crowds have thinned way out since Labor Day, and the river has fully flipped from a morning fishery to a midday one. That 51-degree dawn reading means the fish are not doing much before ten. Sleep in, eat a real breakfast, and plan to fish hard from late morning through late afternoon when the water bumps into the upper 50s. Fishing has been on the technical side, and I won't sugarcoat it. These fish have been looked at, floated over, and fed fake hoppers since June, and the water is low and clear enough that they see everything. The shops in Ennis are saying the same thing I'm seeing: good fish are coming to hand, some genuinely big rainbows and browns among them, but they're being caught by people who fish clean drifts on lighter tippet and change flies when the first choice doesn't work. 4x to your dry, 5x to your dropper. If you're getting refusals on the hopper, that's not a no, that's a size-down. The terrestrial game is hanging on. Warm afternoons still get hoppers clicking in the grass banks from Varney down, and ants and beetles are quietly outfishing the big foam on pressured water. Every year people put the hoppers away too early. Don't. The fall bugs are arriving too. Cloudy days are producing BWOs from midday on, and fish in the slower seams and tailouts are starting to look up for them. The other thing happening is the streamer bite. Browns are getting territorial ahead of the spawn, and the aggression builds every week from here through October. The overcast days in this week's forecast are exactly what you want. It's still early enough that I'd fish smaller stuff, sparkle minnows and single-hook sculpins rather than the giant articulated meat, but that changes fast from here. Access notes: remember the wade-only rules. Quake Lake outlet down to Lyons Bridge is wade fishing only, no fishing from boats, and the same goes for Ennis Bridge down to Ennis Lake. Float fishing legally starts at Lyons. The wade water between $3 Bridge and Raynolds is fishing well for people willing to walk, and honestly the walk-wade angler has the advantage right now because you can slow down and pick apart water a boat covers in thirty seconds. Full rundown of pullouts on the access page. One more thing, since somebody asks every year: the Madison in Montana is open year-round. There's no closing date coming, no season to beat. What you're racing is weather, and late September through October is some of the best fishing of the year here if you can handle a little wind and the odd snow squall.

Tactics for today

Run a hopper-dropper midday: a #12 hopper with two feet of 5x to a #16-18 pheasant tail, fished tight to the banks and along the inside seams, not just down the middle. Mend early so the hopper lands dead and stays dead. When clouds roll in, clip it off and swing a sparkle minnow down and across through the deeper runs, letting it hang at the tailout before you strip it back. Fish every hangdown, that's where the eats come. If you see noses working a slick, a single BWO sparkle dun on a long 5x leader beats any dropper rig. And rest good water. Second passes through a run out-produce first passes this time of year.

Recommended Patterns
Morrish Hopper #10-12Pheasant Tail or Perdigon #16-18BWO Sparkle Dun #18-20Coffey's Sparkle Minnow #4Cinnamon Ant #16

The water

Below Hebgen Dam the river drops into Quake Lake, formed by the 1959 earthquake, then exits into the slide area: steep, boulder-strewn, the most technical wading on the river.

From Lyons Bridge down to Ennis the gradient eases into the classic broken riffle: pocket water, seams behind boulders, and few obvious pools. Fish hold everywhere, which is why covering water beats working one spot.

This is the reach that made the salmonfly hatch famous. In late June and early July the hatch works upstream and the whole valley fills up.

Access

  • Quake Lake outlet: Top of the reach. Steep, rough wading through the slide area.
  • Raynolds Bridge: First bridge access below the slide.
  • Three Dollar Bridge: Public fishing access (conserved and opened to the public in 2002) with a long stretch of wade water.
  • Lyons Bridge: The most-used put-in on the upper river, and the start of the float water.
  • Palisades: Between Lyons and Ruby Creek; short float or wade access.
  • Ruby Creek: Common take-out for the Lyons float.
  • McAtee Bridge: Mid-valley access with parking and a ramp.
  • Varney Bridge: Popular put-in for the run down to Ennis.
  • Ennis: Town ramp at the bottom of the float water, above Ennis Lake.

See the access points guide for GPS coordinates, parking notes and float distances.

When it fishes

  • Winter (December–March): Midges and small nymphs in the slower water. Fish the middle of the day.
  • Spring (April–May): Skwalas and Mother's Day caddis, with runoff usually arriving by late May.
  • Salmonflies (late June–early July): The hatch moves upstream. Crowded, and worth it.
  • Summer terrestrials (July–September): Hoppers, ants and beetles along the banks, with caddis in the evening.
  • Fall (October–November): Baetis on grey days, and brown trout moving toward the spawn.

For the whole river month by month, see the seasons guide and the hatch chart.

Regulations on this reach

  • Two wade-only stretches: Quake Lake down to Lyons Bridge, and Ennis Bridge down to Ennis Lake. No fishing from a boat in either.
  • The rest of the reach is open to fishing from a boat, and the Lyons-to-Ennis water is the standard float.
  • The boat restrictions and closures on this reach change, so check current Montana regulations before you go.

Reading the gauge

Readings come from USGS gauge 06038800 at Kirby Ranch, below Hebgen Dam. Typical summer flows run 900 to 1,400 CFS. Below about 1,100 CFS the wading gets comfortable; much above 1,400 and the banks fish better than the middle.

Live readings for all three gauges are on the river conditions page. New to flow data? See how to read Madison River flow data.

Other reaches today

Frequently Asked Questions

When is the salmonfly hatch on the Upper Madison?

Usually late June into early July, though it shifts a week or more either way with runoff and water temperature. The hatch starts in the lower part of the reach and works upstream. See the salmonfly guide for how to track it.

Can you fish from a boat on the Upper Madison?

On most of it, yes. Two stretches are wade-only: Quake Lake to Lyons Bridge, and Ennis Bridge to Ennis Lake. The standard float is Lyons Bridge down toward Ennis.

What is a good flow for wading the Upper Madison?

Between about 800 and 1,100 CFS at Kirby the river is comfortable to wade. Higher than that and it gets pushy through the boulder runs. Felt soles or cleats and a wading staff are worth having regardless.