Fishing Report

Castle Rock fishing

Montana, USA Upper Yellowstone watershed 45.472°, -109.740°
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Castle Rock -- Montana fishing area
Castle Rock Montana · Upper Yellowstone watershed
About this spot

Castle Rock

Castle Rock Fishing Access Site near Colstrip, Montana, offers quality angling on the Tongue River Reservoir. Best fishing spots include the dam area, coves near the state park, and the river inlets. Shore access is available at designated points, but boat access via the main ramp near the campground opens up more hotspots. Species include smallmouth bass, northern pike, walleye, crappie, and catfish. Spring and fall are prime seasons. Use jigs, crankbaits, and live minnows for bass and walleye; spoons or large swimbaits for pike. The reservoir’s warm waters support strong summer fishing, especially early morning or evening.
StateMontana
WatershedUpper Yellowstone
Latitude45.4724°
Longitude-109.7402°
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 Castle Rock -- 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 Castle Rock as a favorite, set a custom threshold (water temperature, streamflow, snowpack), and the iOS app will push the moment conditions cross.

FAQ

About Castle Rock

What fish species are found at Castle Rock?

Snoflo tracks the species commonly reported at Castle Rock -- 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 Castle Rock.

How do I get to Castle Rock?

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 Castle Rock.