Fly fishing across the American West

River atlas.

Track current fishing conditions and forecasts across rivers in the American West.

Explore by stateMontana Six rivers. One complete read.

10 of 10 forecasts fresh / Checked

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River reports are ready in the directory.

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River forecast locationsUS Census / US Atlas
80–100% rating60–79%Below 60%No ratingDashed: stale× Unavailable

All available forecasts

River directory

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

10 rivers in the atlas

  1. South-Central Montana

    Bighorn River

    Fort Smith, Montana

    7/10Good
    Fresh forecast
    Flow
    1,840 cfs and rising
    Water
    Unavailable

    Fish deep runs and tailouts where trout concentrate in stable tailwater flows.

    Forecast hatches Midges, BWOs, Scuds, Caddis, Annelids

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:15 AM MDT
    Water temperature observation
    Observed Oct 29, 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.

  2. Northeastern Utah

    Green River

    Flaming Gorge, Utah

    7/10Good
    Fresh forecast
    Flow
    2,190 cfs and steady
    Water
    53°F

    Fish deep runs and tailouts with a long leader and a natural drift.

    Forecast hatches Midges, BWOs, Scuds, Caddis, Terrestrials

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:30 AM MDT
    Water temperature observation
    Observed Oct 29, 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: Green River near Greendale · 09234500. The forecast point may differ from the gauge location.

  3. Southwest Montana

    Madison River

    Ennis, Montana

    7/10Good
    Fresh forecast
    Flow
    926 cfs and falling
    Water
    39°F

    Fish slow, deep runs and shelf edges where trout congregate in cold water.

    Forecast hatches Midges, BWOs, Caddis, Stoneflies, Scuds

    Generated

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

  4. Central Montana

    Missouri River

    Craig, Montana

    7/10Good
    Fresh forecast
    Flow
    2,810 cfs and falling
    Water
    51°F

    Fish slow tailouts, seams, and drop-offs with a drag-free drift. Keep your indicators small and your tippet light.

    Forecast hatches BWOs, Midges, Scuds, Caddis, Terrestrials

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:45 AM MDT
    Water temperature observation
    Observed Oct 29, 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.

  5. Western Wyoming / Eastern Idaho

    Snake River

    Jackson Hole and the South Fork region

    7/10Good
    Fresh forecast
    Flow
    1,790 cfs and falling
    Water
    42°F

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

    Forecast hatches BWOs, Midges, Caddis, Mahogany Duns, Scuds

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:30 AM MDT
    Water temperature observation
    Observed Oct 29, 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: Snake River near Moran · 13011000. The forecast point may differ from the gauge location.

  6. Front Range Colorado

    South Platte River

    Deckers, Colorado

    7/10Good
    Fresh forecast
    Flow
    105 cfs and steady
    Water
    Unavailable

    Focus on slow, deep runs and shelf water with a drag-free drift.

    Forecast hatches Midges, BWOs, Scuds, Caddis, Terrestrials

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:45 AM MDT
    Water temperature observation
    Observed Oct 29, 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: South Platte River at Deckers · 06701900. The forecast point may differ from the gauge location.

  7. Southwest Montana

    Yellowstone River

    Paradise Valley, Montana

    7/10Good
    Fresh forecast
    Flow
    1,600 cfs and falling
    Water
    Unavailable

    Dead drift close to the bottom in slower runs and deep seams where trout hold during cold mornings.

    Forecast hatches BWOs, Midges, Caddis, Stoneflies, Terrestrials

    Generated

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

  8. Western Montana

    Blackfoot River

    Ovando to Bonner, Montana

    6/10Fair
    Fresh forecast
    Flow
    683 cfs and falling
    Water
    42°F

    Fish deep and slow along the bottom where trout are holding in cold water.

    Forecast hatches BWOs, Midges, Stoneflies, Caddis, Terrestrials

    Generated

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

  9. Southwest Montana

    Gallatin River

    Big Sky to Gallatin Gateway, Montana

    6/10Fair
    Fresh forecast
    Flow
    246 cfs and falling
    Water
    37°F

    Fish deep pocket water and slow seams where trout hold in cold flows. Dead-drift your flies close to the bottom with minimal drag.

    Forecast hatches Midges, BWOs, Stoneflies, Caddis, Scuds

    Generated

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

  10. Eastern Idaho

    Henry's Fork

    Last Chance to Ashton, Idaho

    6/10Fair
    Fresh forecast
    Flow
    84 cfs and falling
    Water
    Unavailable

    Use a long, fine leader with a delicate presentation in slow spring creek runs. Keep dead drifts drag-free.

    Forecast hatches Midges, BWOs, Caddis, Scuds, Little Black Stones

    Generated

    Full forecast
    Forecast timing & sources
    Forecast generated
    Oct 29, 2026, 7:00 AM MDT
    Valid until
    Oct 30, 2026, 7:00 AM MDT
    Source updated
    Oct 29, 2026, 7:00 AM MDT
    Flow observation
    Observed Oct 29, 2026, 6:45 AM MDT
    Water temperature observation
    Observed Oct 29, 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: Henrys Fork near Island Park · 13039000. The forecast point may differ from the gauge location.

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.