Fishing Report

Boulder River fishing

Montana, USA Missouri Headwaters watershed 45.867°, -111.946°
Today high
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Fish species
2
Nearby gauges
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Boulder River -- Montana fishing area
Boulder River Montana · Missouri Headwaters watershed
About this spot

Boulder River

The Boulder River fishing area in Montana, USA is a popular destination for anglers. The river is home to several species of fish, including rainbow, brown, and cutthroat trout. Nearby activities include hiking, camping, and wildlife viewing. Fishing tips include using dry flies and nymphs, and fishing in the deeper pools and runs. The best time of year to visit is from late June to early September, with average temperatures ranging from 60 to 80 degrees Fahrenheit.
StateMontana
WatershedMissouri Headwaters
Latitude45.8669°
Longitude-111.9455°
Fish species

What's biting at Boulder River

Species commonly reported here -- tap any card for techniques, target seasons, and other waters where it's been caught.

Detailed forecast

Plan your trip down to the hour

Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max so trends jump out at a glance.

Time Condition Temp (°F) Snow (in) Rain (in) Humidity (%) Wind (mps) Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks. Hover any point for the full breakdown.

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Live water

Nearby streamflow

USGS streamgauges within reach of Boulder River -- updated continuously from the National Water Information System.

Angling safety & ethics

Know the regulations
Check local fishing rules, seasons, size limits, and license requirements to ensure legal and sustainable angling.
Handle fish responsibly
Use wet hands, minimize air exposure, and release fish gently to improve survival rates when practicing catch-and-release.
Choose the right gear
Match your rod, line, and tackle to the species and conditions to increase success and reduce unnecessary harm to fish.
Respect the waterway
Avoid disturbing habitat, prevent bank erosion, and keep a safe distance from spawning areas to protect ecosystems.
Keep it clean
Pack out all line, hooks, bait containers, and trash. Discarded gear can injure wildlife and degrade waterways.

Set push alerts in the Snoflo app

Save Boulder River as a favorite, set a custom threshold (water temperature, streamflow, snowpack), and the iOS app will push the moment conditions cross.

FAQ

About Boulder River

What fish species are found at Boulder River?

Snoflo tracks the species commonly reported at Boulder River -- see the Fish Species panel above for the live list with images and links to per-species pages.

How fresh is the weather data on this page?

The hourly forecast updates throughout the day from the NOAA / yr.no public feeds. Streamflow data comes live from USGS streamgauges, also refreshed continuously.

Can I get alerts when conditions change?

Yes -- alerts are managed through the Snoflo iOS app. Favorite this area, set a threshold (water temperature, streamflow, snowpack), and you'll get a push the moment it crosses.

Do I need a fishing license?

Yes. Check your state agency's regulations for license requirements, seasons, size limits, and any waterbody-specific rules before fishing Boulder River.

How do I get to Boulder River?

Tap Open in map in the hero above to center the Snoflo interactive map on this area, or grab the coordinates from the location facts panel.

More fishing

Other angling spots near here

Snoflo-tracked fishing areas within driving distance of Boulder River.

Premium feature

Favorites and custom alerts are part of Snoflo Premium. Save spots, set thresholds, and get push notifications when conditions change.

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Manage alerts in the Snoflo app

Custom push alerts are configured in the iOS app -- favorite this spot, set a threshold (water temperature, streamflow, snowpack), and you'll get a push the moment it crosses.

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