A field guide to 6 Montana rivers

Montana
river forecasts.

From the Madison, Gallatin and Yellowstone in the southwest to the Missouri, Bighorn and Blackfoot: compare six distinct stretches of Montana trout water.

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6 of 6 forecasts fresh / Checked

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80–100% rating60–79%Below 60%No ratingDashed: stale× Unavailable

All available forecasts

Browse every river in the atlas. Open one for recommended flies, hatch windows and fishing approach.

6 rivers in the atlas

  1. Central Montana

    Missouri River

    Craig, Montana

    8/10Good
    Fresh forecast
    Flow
    2,870 cfs and steady
    Water
    51°F

    Use a long leader and a mend-free drift to match the steady tailwater current.

    Forecast hatches Midges, BWOs, Scuds, Caddis, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:45 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:45 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Missouri River near Wolf Creek · 06073600. The forecast point may differ from the gauge location.

  2. South-Central Montana

    Bighorn River

    Fort Smith, Montana

    7/10Good
    Fresh forecast
    Flow
    1,790 cfs and steady
    Water
    Unavailable

    Keep your drifts natural and close to the riverbed where fish are holding in steady tailwater flows.

    Forecast hatches BWOs, Midges, Scuds, Caddis, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:15 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:15 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Bighorn River at Bighorn, Montana · 06287000. The forecast point may differ from the gauge location.

  3. Southwest Montana

    Gallatin River

    Big Sky to Gallatin Gateway, Montana

    7/10Good
    Fresh forecast
    Flow
    264 cfs and falling
    Water
    40°F

    Fish slow, deep runs and seams with a long, dead-drift presentation close to the river bottom.

    Forecast hatches Midges, BWOs, Stoneflies, Caddis, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:30 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:30 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Gallatin River above Deer Creek, near Big Sky · 06043120. The forecast point may differ from the gauge location.

  4. Southwest Montana

    Madison River

    Ennis, Montana

    7/10Good
    Fresh forecast
    Flow
    942 cfs and falling
    Water
    41°F

    Keep a tight line and drift your flies close to the bottom in slower runs where trout are holding in cold water.

    Forecast hatches BWOs, Midges, Caddis, Stoneflies, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:00 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:00 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Madison River at Ennis · 06040050. The forecast point may differ from the gauge location.

  5. Western Montana

    Blackfoot River

    Ovando to Bonner, Montana

    6/10Fair
    Fresh forecast
    Flow
    697 cfs and rising
    Water
    44°F

    Focus on slow margins, deep riffle seams, and drop-offs where trout hold in cold water.

    Forecast hatches BWOs, Midges, Caddis, Stoneflies, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:30 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:30 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Blackfoot River near Bonner · 12340000. The forecast point may differ from the gauge location.

  6. Southwest Montana

    Yellowstone River

    Paradise Valley, Montana

    6/10Fair
    Fresh forecast
    Flow
    1,620 cfs and falling
    Water
    Unavailable

    Dead drift your nymphs through deep runs and slow seams where trout hold in cold water.

    Forecast hatches BWOs, Midges, Caddis, Stoneflies, Terrestrials

    Generated

    Forecast timing & sources
    Forecast generated
    Oct 28, 2026, 7:00 AM MDT
    Valid until
    Oct 29, 2026, 7:00 AM MDT
    Source updated
    Oct 28, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 28, 2026, 6:00 AM MDT
    Water temperature observation
    Observed Oct 28, 2026, 6:00 AM MDT

    Buggin combines river and weather signals into a fishing forecast. A rating is model guidance, not a catch guarantee. Observation times can differ from forecast generation.

    Configured gauge: Yellowstone River near Livingston · 06192500. The forecast point may differ from the gauge location.

Know the water

Six rivers, different decisions.

These permanent river notes describe the configured forecast areas. For current conditions, use the dated reports above.

Southwest Montana

Madison River

The Madison runs out of Yellowstone National Park, through Quake Lake and the famed fifty-mile riffle water between Lyon Bridge and Ennis. It is one of the most consistent trout rivers in Montana because dam influence and broad insect diversity keep fish feeding through a wide range of spring conditions.

Forecast area: Ennis, Montana. Configured gauge: Madison River at Ennis (06040050).

Southwest Montana

Gallatin River

The Gallatin starts in Yellowstone National Park and fishes through a long canyon corridor near Big Sky before flattening out toward the valley. Most anglers know it for easy roadside access, cold clear water, and technical pocket-water trout fishing.

Forecast area: Big Sky to Gallatin Gateway, Montana. Configured gauge: Gallatin River above Deer Creek, near Big Sky (06043120).

Southwest Montana

Yellowstone River

The Yellowstone is the longest undammed river in the lower forty-eight and the heart of Montana float-fishing culture through Paradise Valley. It is broad, mobile, and changes with every weather push, which is why reading current speed is more important here than reading a single seam.

Forecast area: Paradise Valley, Montana. Configured gauge: Yellowstone River near Livingston (06192500).

Central Montana

Missouri River

The Missouri below Holter Dam is a classic Montana tailwater centered around Craig, with long flats, consistent bug life, and heavy trout numbers. It is one of the state's most dependable technical fisheries because stable flows and fertile water keep fish feeding across a long season.

Forecast area: Craig, Montana. Configured gauge: Missouri River near Wolf Creek (06073600).

South-Central Montana

Bighorn River

The Bighorn below Yellowtail Dam is one of the West's most productive tailwaters and a centerpiece of the Fort Smith fishery. Rich weed growth and stable cold water support dense trout populations and steady insect life for much of the year.

Forecast area: Fort Smith, Montana. Configured gauge: Bighorn River at Bighorn, Montana (06287000).

Western Montana

Blackfoot River

The Blackfoot flows northeast of Missoula and is known for classic freestone structure: boulders, wood, deep bends, and long riffle-to-run transitions. It is a river that fishes on mood and clarity more than on a rigid tailwater schedule.

Forecast area: Ovando to Bonner, Montana. Configured gauge: Blackfoot River near Bonner (12340000).

About the forecasts

A forecast with context.

Conditions in context

Buggin forecasts combine river conditions, weather and hatch timing. Ratings describe the forecast’s fishing outlook; they do not measure catches or confirm safe access.

Freshness you can read

Fresh means the API marks the report fresh and it is within its validity window, capped at 24 hours. Stale reports keep their original timestamps. Missing measurements stay unavailable.

Transparent sources

The atlas checks for updates every five minutes while open. Source context: USGS river observations and Open-Meteo weather. Forecast generation and observation times are shown separately for each river.