Is the Big Hole River fishable right now?

Right now the Big Hole River is running 569 cfs, which rates prime against its prime 500–1,800 cfs band. Today's bite odds are 100 out of 100, with partly cloudy (29% cloud). These are probabilistic odds from live data, not a guarantee — a sharp change in flow is the variable most likely to slow the fishing.

What is the best month to fish the Big Hole River?

The best months on the Big Hole River are July, September, June, August. These combine settled flows in the river's prime band with the season's strongest hatches. Big Hole River's overall season runs freestone — high in spring runoff; prime june–september, low and warm in late summer.

What flow (cfs) is good for fishing the Big Hole River?

The Big Hole River fishes best in roughly the 500–1,800 cfs range (its prime band). It stays fishable from about 250 cfs up toward 5,000 cfs; below that it's low and skinny, and above 5,000 cfs it's typically blown out and off-color. We compare the live USGS discharge to this band on every reading.

Big Hole River, Montana fishing report — flows, bite odds & best time to fish

Right now the Big Hole River is flowing 569 cfs — right in its prime fishable band. Today's bite odds rate 100/100 (Prime), and the sky looks partly cloudy.

569 cfscurrent flow

500–1,800prime band (cfs)

29%partly cloudy

Primetoday's read

Best time to fish the Big Hole River, Montana

The best months on the Big Hole River are July, September, June, August — when the flow settles into its prime band and the hatches line up, the odds genuinely worth booking around. Today's flow is one data point; the next 7 days below show how the bite window is trending. Plan ahead and book a guide for your dates.

Find Big Hole River guides → Best-months guide for the Big Hole River →

Know when the Big Hole River is fishing right

Flows and the bite shift week to week. Leave your email and we'll tell you when the Big Hole River hits its best window — time to book a guide for your dates.

Flow & bite outlook for the Big Hole River — the next 7 days

Wed 6 AM 100

Thu 6 AM 99

Fri 6 AM 95

Sat 6 AM 76

Sun 6 AM 71

Mon 6 AM 66

Tue 6 AM 62

Day	Flow (cfs)	Sky	Bite
Wed 6 AM	569 ✓	29% · partly cloudy	100 Prime
Thu 6 AM	569 ✓	50% · mostly cloudy	99 Prime
Fri 6 AM	569 ✓	24% · partly cloudy	95 Prime
Sat 6 AM	569 ✓	22% · partly cloudy	76 Prime
Sun 6 AM	569 ✓	23% · partly cloudy	71 Prime
Mon 6 AM	569 ✓	9% · clear skies	66 Prime
Tue 6 AM	569 ✓	8% · clear skies	62 Prime

A ✓ means the flow sits in the Big Hole River's prime 500–1,800 cfs band — the season and the moon/solunar windows then move each day's bite odds.

Conditions & the best window

The prime bite is dawn and the last hour of light, strongest around the new and full moon. Today's sky on the Big Hole River looks partly cloudy (about 29% cloud) — and an overcast day can actually keep fish looking up. Watch the flow as much as the sky: a sharp change in discharge, up or down, can turn the fish off for a day.

The Melrose-to-Glen stretch is the guide standard and fishes well from a boat; the canyon above Divide is roadside pocket water for waders. Watch the late-summer numbers — this river gets genuinely low and warm in August, and hoot owl restrictions closing fishing from 2pm are common.

Guided trips & lodges on the Big Hole River

Links below go to live FishingBooker search results. We're finalizing our affiliate partnership — once active we'll earn a commission on bookings at no extra cost to you. Disclosure.

A guided day on the Big Hole River typically runs $450–$625 per boat. A local guide who knows the current flow and the productive water is the fastest way onto fish — book ahead for the dates you want.

Guided fly-fishing float trips on the Big Hole River

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Half-day walk & wade trips, Big Hole River

FishingBooker · guided trips · from $293

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Multi-day lodges & guided packages near the Big Hole River

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These are probabilistic fishability odds, not a guarantee. We build them from live USGS streamflow, each river’s published fishable-flow band, the curated season, and a moon/solunar model — flow and weather can change fast, and even a perfect flow on the right moon can fish slow. Some prime days disappoint; some marginal ones surprise. How we compute the score.