Big Hole River Fly Fishing Report
Wise River, Beaverhead County, Montana · Last Updated: July 16, 2026
Remote and pristine, the Big Hole River flows through one of the last great untouched valleys in the West. It supports a healthy population of wild brown and rainbow trout, plus the iconic Arctic grayling — one of the few places in the lower 48 where they still exist.
Today's Trout Fishability
Conditions at a Glance
On the Big Hole River near Wise River, flow stands at 443 cfs while water temperature reaches 68°F, 15 percent above the 59°F average.
- Water is approaching the trout stress threshold — fish early and handle fish quickly
- Water temperature varies 66.2–77.4°F across gauges — warmer reaches are stressing trout; fish the cooler water and early.
- Low, skinny water
- Bright bluebird skies
How Do You Fish a 5.3/10 Day?
See the fly patterns built for today's conditions, where the fish are holding, and how to work the 5:30 AM - 9:00 AM, 6:00 PM - 8:00 PM window.
Today's Weather
See hourly conditions, wind speeds, barometric pressure, and 5-day outlook
USGS Water Monitoring
Real-time data from 3 monitoring stations
See station-by-station details, historical ranges, and trend analysis
What's Hatching This Month
Rocky Mountain West — typical for July
5.3/10 Today — See the Full Big Hole River Breakdown
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Big Hole River Fly Fishing — FAQ
Is the Big Hole River fishing well right now?
DriftWise scores the Big Hole River every morning on a 0–10 fishability scale that weighs real-time USGS flow and water temperature, National Weather Service forecasts, and lunar data. Check the live fishability score and condition summary above for today's rating before you head out.
What is the current water flow on the Big Hole River?
The Big Hole River's flow is tracked by USGS streamflow gauges near Wise River, Beaverhead County, Montana and refreshed daily in the condition summary above. Flow is reported in cubic feet per second (cfs) and compared against the seasonal average so you can see whether the river is running high, low, or normal.
What is a good water temperature for trout on the Big Hole River?
Trout feed most actively when water temperatures sit roughly between 48°F and 62°F. DriftWise reads live Big Hole River water temperature from USGS sensors near Wise River, Beaverhead County, Montana — see the summary above for the current value.
When is the best time of day to fish the Big Hole River?
The most productive windows shift with the season: cold months fish best around midday (10 AM–2 PM) once the water warms, while summer rewards early mornings and evenings. Each Big Hole River report factors in the current season.
Do I need a fishing license to fly fish the Big Hole River?
Yes. A valid Montana fishing license is required to fish the Big Hole River. Check current Montana regulations for seasons, limits, and any special catch-and-release or fly-fishing-only sections before you go.
Is the DriftWise Big Hole River fishing report free?
Yes. The daily Big Hole River condition summary — flow, water temperature, weather, and fishability score — is free. A free account (3 reports per month) unlocks the full AI analysis with fly-pattern recommendations and a detailed hatch forecast.
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