Lower Madison River Fishing Report

Ennis Dam to Three Forks

Below Ennis Lake the Madison drops through Bear Trap Canyon and then flattens out for the last thirty miles to Three Forks. It is a different river from the Upper: shallower, weedier, warmer, and closer to Bozeman. That combination makes it the most accessible reach and the one most often shut down by summer heat.

Lower Madison — Today's Report

Thursday, November 12, 2026

Live Data

Updated Nov 12, 6:03 AM MST

Lower Madison Fishing Report

Ennis Dam to Three Forks
Water Temp (McAllister) 43.2°F
Flow Rate (McAllister) 1,160 CFS
Water Clarity Good

The gauge below Ennis Dam read 1160 cfs this morning with water at 43.2 degrees. That's a solid winter-pattern flow for the Lower, enough water to keep the fish comfortable and float the Warm Springs to Black's Ford run without dragging. Clarity is good, call it three-plus feet, with that slight green tailwater tint the Lower always carries thanks to Ennis Lake. All the summer problems are off the table. The Lower pulls warm water off the top of Ennis Lake and cooks in July, and hoot owl restrictions shut down afternoons when temps run hot, but at 43 degrees that's a memory. There are no FWP restrictions on this reach right now, you can fish it dawn to dark, though in November there's zero reason to. The water is coldest at sunrise and the fish don't really wake up until it warms a degree or two. The afternoon bite, roughly noon to four, has been the whole show. The Lower in late fall is a nymphing river, and the menu is what it always is down here: crayfish, worms, sowbugs, and midges. The fish are stacked in the deeper slots and troughs, and the weed beds that choke this river all summer have mostly died back, which makes drifting deep rigs a lot less miserable than it was in September. Find the dark green slots between the pale weedy flats and you've found the fish. The riffle corners where a trough breaks off the shallows have been money. Midges are hatching midday and on the calm, warmer afternoons you'll find pods of fish sipping in the slicks and back eddies, especially from Black's Ford down. It's heads-up fishing, small flies and soft presentations, and worth carrying a dry rod for even if you nymph most of the day. Bear Trap Canyon is a real option right now and almost nobody is in there. Access is on foot only, from the trailhead at the downstream end off Highway 84, and the trail runs about nine miles upstream toward the dam. You don't need to march nine miles. The first mile or two of canyon water holds plenty of fish, and the deep boulder runs in there fish really well with a crayfish pattern bounced along bottom. Wear studs, those rocks are greased bowling balls, and remember you're hiking out at the end of the day with short November light, so watch your turnaround time. The browns down here are spawning too, same drill as upstream, leave the gravel redds alone and fish the deep water below them. Streamer fishing has been fair, not great, better on the gray days, with smaller olive and white stuff outproducing the big articulated bugs. If I'm being straight with you, the Upper has been fishing a touch better day in and day out this week, and if you want rising fish the Upper's BWO tailouts are the better play. But if you want solitude and a shot at a heavy rainbow on a crayfish, the Lower is a fine way to spend a mild November afternoon. Check the Lower Madison access points before you go, a couple of the sites get sketchy once the ramps start icing in the mornings.

Tactics for today

Sleep in, eat a real breakfast, and be on the water at noon. Rig the crayfish or worm up top with the sowbug or Zebra Midge behind, set your indicator deep, and work the slots methodically, three or four drifts per lane, then step down. Add a split shot, the fish are glued to the bottom and a rig riding two feet up catches nothing. When you spot sippers in a slick, switch to the Griffith's Gnat on 6x with a reach cast so your tippet lands off their window. In Bear Trap, high-stick the boulder pockets with the crayfish rig, short drifts, lead the flies with your rod tip, and set on anything that hesitates.

Recommended Patterns
Clouser Crayfish #6-8San Juan Worm #8-10Ray Charles Sowbug #16Zebra Midge #18Griffith's Gnat #18-20

The water

Water leaves Ennis Lake off the top, which means it arrives warm. That single fact drives most of what happens on this reach: early hatches in spring, excellent fishing in the shoulder seasons, and hoot owl restrictions through much of the summer.

Bear Trap Canyon, immediately below the dam, is BLM wilderness: a nine-mile walk-in canyon with pocket water and real whitewater. It holds up better in the heat than the valley water below it.

Downstream of the canyon the river spreads out shallow and weedy over a gravel bed. It fishes more like a big spring creek than a freestone, and the trout see a lot of flies.

Access

  • Bear Trap Canyon (BLM): Wilderness. The developed trailhead sits at the downstream end of the canyon, off Highway 84; the trail follows the bank about nine miles upstream toward the dam. No vehicles, and the whitewater has drowned experienced boaters. Wade it.
  • Warm Springs: Top of the valley float water, and the reach's main put-in.
  • Damselfly: Next launch below Warm Springs, above Black's Ford. Common short-float take-out.
  • Black's Ford: Mid-reach access with a ramp.
  • Greycliff: Gravel ramp and camping, mid-valley.
  • Cobblestone: Walk-in access further down the valley toward Three Forks. No boat ramp.

See the access points guide for coordinates and float distances.

When it fishes

  • Mother's Day caddis (late April to mid-May): The reach's signature hatch, and often the best dry fly fishing of the year here. Patterns and sizes: the hatch chart.
  • Early summer (June): Good fishing before the water warms, with caddis in the evenings.
  • Hoot owl season (July–August): Water regularly exceeds 70°F. Expect afternoon closures and fish mornings only, or go to the Upper.
  • Fall (September–October): Nights cool the water back down and the reach comes alive again. BWO on grey afternoons — sizes and emergers: hatch chart.
  • Winter (November–March): Midges and nymphs. Being a tailwater, it stays fishable when other water does not. Winter midge patterns: hatch chart.

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

Regulations on this reach

  • Hoot owl restrictions are common here from mid-July through August: fishing is closed daily from 2 p.m. to midnight once water temperatures stay high.
  • Montana FWP announces restrictions week to week. Check before you drive out.
  • Bear Trap Canyon is BLM wilderness with its own access rules.
  • See current regulations for licences, limits and gear restrictions.

Reading the gauge

Readings come from USGS gauge 06041000 near McAllister, below Ennis Dam. Water temperature matters more than flow on this reach. Once it holds above 70°F, fishing is hard on the trout no matter what the flow looks like.

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

Is the Lower Madison under hoot owl restrictions?

Frequently, from mid-July into August. When water temperatures stay high, Montana FWP closes fishing daily from 2 p.m. to midnight. The current report above shows today's water temperature; check FWP for the official restriction list.

When is the Mother's Day caddis hatch on the Lower Madison?

Usually the first two weeks of May, before runoff. It is the best-known hatch on this reach and can produce excellent dry fly fishing for a short window.

Can you fish Bear Trap Canyon?

Yes. It is BLM wilderness below Ennis Dam, reached on foot from the trailhead at the downstream end of the canyon off Highway 84. It holds cooler water than the valley section below it, which makes it a better bet in hot weather.

How warm is too warm on the Lower Madison?

Hooked trout recover poorly once water holds above about 70°F. FWP’s hoot owl criterion is stricter on paper, daily maximum temperatures of 73°F for three consecutive days, but 70°F is where you should stop on your own, restriction or not.