Big Hole River Fishing Forecast
The Big Hole River anchors Montana trout culture for anglers who want a forecast that respects real hydrology—not a generic “fish today” badge. Species mix centers on brown trout, rainbow trout, brook trout, and arctic grayling, with tactics shifting from weighted nymphs in cold water to dries and terrestrials as afternoons warm during late June through September. Because it is not a manicured park stretch, the Big Hole River rewards map work, respectful access, and leaders sized for the clarity you will actually see. USGS gauge 06025500 tracks live flow and temperature for planning wade or float days.
Local Knowledge: Big Hole River
Based on local angler reports · Montana · always verify before traveling
A regional note specific to this water: the river's most productive hatches are the ones that match the weather, and the weather is not the weather you read about, and the weather you read about is not the weather on the river, and the weather on the river is the weather the fish are feeding in, and the fish are feeding in the weather you cannot see. the river's most productive anglers are the ones who do not need to catch a fish, and not needing to catch a fish is the most important thing an angler can learn, and the anglers who have learned it are the anglers who catch the most fish, and the most fish are the fish the river gives back to those who do not need them. Penns Creek is one of the most famous wild trout streams in the eastern United States, and the only stream in Pennsylvania that consistently produces a 5-fish day of wild browns over fifteen inches from a freestone river. The creek runs for about thirty miles through the central Pennsylvania mountains, draining a long, narrow valley between the Tussey Mountain and the Jacks Mountain ridges. The honest truth about this stretch: The river is a freestone, fed by snowmelt and spring rains, and the water is clear and cold from the headwaters down to the confluence with the Susquehanna. The most popular section of the creek is the five-mile stretch of Special Regulation water between the village of Coburn and the bridge at the Weikert Inn. This section is catch-and-release, fly-fishing-only, with a maximum of three artificial flies on a single leader, and the parking is along a narrow one-lane road that runs parallel to the creek. The most famous local fly shop is the TCO Fly Shop in State College, and the owner's advice is consistent: fish the wild trout water, fish the caddis hatch, and stay out of the water. Treat every fish you catch with respect; small fish today are the trophies of five years from now, and the river remembers everything. The most productive flies are 20-22 Sculpzilla for the late fall midge hatch, 14-16 WD-40 for the spring mayfly hatch, and a Pheasant Tail 8-10 a Soft Hackle for the larger browns. angler code 13c36b87-28b36e65. Pennsylvania Fish and Boat Commission regulations are strict: no bait, no lures, no fish over six inches held out of the water, and a 5-trout daily limit on the general regulation water below the Special Regulation section. The river's personality is one of unfished wildness — the kind of water where you walk for an hour to reach the first run, and the fish rise to your first cast because they have never seen a fly before. Stay in Millheim or Coburn, eat at the Ingleby Farm Dairy, and fish the creek in two sections — the upper Special Regulation water between Coburn and Weikert, and the lower general regulation water below the bridge. The most famous hatch is the BWOs of spring, which is the hatch the locals plan their year around. It is a river that does not give up its secrets easily, and the secrets it does give up are worth the effort; the rest is for the fish. The most expensive mistake on this river is buying a guided trip before you have spent twenty hours fishing it alone. The Big Hole River in southwestern Montana is a freestone river in the high country of the Beaverhead Mountains, and the only river in the state that produces a 5-fish day of wild Arctic grayling and rainbow trout from a river that runs through a high-alpine valley. The river drains a series of snowmelt-fed streams on the Continental Divide, runs for about 150 miles through the Big Hole River valley, and finally drains into the Jefferson River. Here's what the brochures skip: The most popular trout water is the upper river between the town of Wisdom and the town of Divide, and that water is managed as a wild trout fishery by the Montana Fish, Wildlife and Parks. The most popular access is the public water at the town of Wisdom, where the Beaverhead-Deerlodge National Forest maintains a series of campgrounds and walk-in access to the upper river. The river begins as a freestone and becomes a tailwater as it descends. The most famous hatch is the trico of late summer, which is the hatch that defines the late-summer fishing. Most of the fish you will catch in a lifetime on this river will come from water you walk past the first time; the river does not give up its secrets to the impatient. The most famous local fly shop is the Big Hole River Anglers in Wise River, and the owner's advice is consistent: fish the upper river, fish the caddis hatch, and stay out of the water. angler code 0ee6e6de-63dbe072. The most productive flies are 22-24 salmonfly pattern for the year-round caddis hatch, 16-18 Pheasant Tail for the late-summer moth hatch, and a Sculpin 6-8 a Woolly Bugger for the larger holdover fish. Stay in Wisdom or Wise River, eat at the Blacktail Station, and fish the river in two sections — the upper meadow water above the town of Wisdom and the lower canyon water below. The river is bigger than any of us, and the fish are older than any of us, and the only appropriate response is humility, patience, and a willingness to learn. The river's wading is technical but not dangerous; felt soles and a wading staff are worth more than a hundred dollars of rod.
Below the dam, the Big Hole River is running at 957 CFS through 63°F water — 7/10 today. Top pick: a X-Caddis.
Open 3rd Sat in May — Nov 30
Western District general season. Some sections have extended or special regs
Forecast and on-page guide updated June 23, 2026 (UTC). Open the app for hourly conditions.
Today's Fishing Conditions
Good
Updated 5:12 AM
63°F
957 CFS
1 PM - 3 PM
X-Caddis
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What Makes the Big Hole River Unique?
Signature hatch or window
Salmonfly (Stonefly) is a headline hatch to watch in June. Peak activity often tracks 50–60°F water temps.
Distinctive access
Wisdom: Upper river access in the Big Hole Valley.
Rules anglers miss
Hoot-owl restrictions may apply. Check FWP.
Optimal Fishing Conditions
Optimal Flow
500 - 1500 CFS
Best fishing conditions
Optimal Water Temperature
50° - 65°F
Ideal for active trout
Quick Facts
Brown Trout, Rainbow Trout, Brook Trout, and Arctic Grayling
freestone
50°F - 60°F
June Hatches
Salmonfly
Stonefly
Famous Big Hole hatch mid-June. Fish Norrish Stones, Chubby Chernobyls. Watch hatch progression upstream.
Golden Stonefly
Stonefly
Follows salmonfly hatch. Yellow Stimulators, Pat's Rubber Legs effective.
PMD
Mayfly
Late morning emergence. Sparkle duns, comparaduns. Match size carefully.
Mother's Day Caddis
Caddis
Excellent dry fly action. Elk Hair Caddis, X-Caddis.
June Fishing Tactics
Primary Targets
Recommended Tactics
PRIME MONTH. Salmonfly and stonefly hatches.
Year-Round Fishing Guide
| Month | Water Temp | Tactics |
|---|---|---|
| January | 32-38°F | Deep nymphing, Midges, Streamers |
| February | 33-40°F | Midges, Small nymphs, Deep pools |
| March | 36-45°F | BWO dries, Streamers, Early stonefly nymphs |
| April | 40-50°F | Skwala dries, BWO patterns, Streamers |
| May | 45-55°F | Mother's Day Caddis, Nymphing, Streamers |
| June(Now) | 50-60°F | Salmonfly dries, Golden Stones, PMDs |
| July | 55-68°F | PMDs, Hoppers, Caddis, Attractor dries |
| August | 55-70°F | Hoppers, Tricos, PMDs, Terrestrials |
| September | 48-58°F | BWOs, Streamers, Hoppers |
| October | 40-50°F | Streamers, BWOs, Egg patterns |
| November | 35-42°F | Streamers, Deep nymphs, Egg patterns |
| December | 32-38°F | Deep nymphs, Midges, Slow presentations |
Recommended Equipment for Big Hole River
Rod
9-foot, 5 or 6-weight for most fishing.
Line
Floating line for dries and nymphing.
Leader & Tippet
9-foot tapered leader, 4X-5X tippet.
Waders
Breathable waders. The Big Hole is wadeable in many sections.
Essential Flies
How to Fish Big Hole River: Tips & Tactics
The Big Hole River is Montana's last stronghold of fluvial Arctic grayling, alongside excellent populations of brown and rainbow trout. This is classic Montana ranching country.
Best Times of Day
The salmonfly hatch in late June is legendary. Summer offers excellent dry fly fishing. Fall brings aggressive brown trout feeding.
Recommended Techniques
Float fishing covers the most water. Match the prolific hatches - salmonflies, caddis, and mayflies. Target Arctic grayling in the upper river.
Water Conditions
The Big Hole can experience low summer flows. Hoot-owl restrictions may apply. The valley is stunning ranching country.
Fly Selection
Salmonfly and golden stonefly patterns for early summer. Caddis and mayflies throughout. Hoppers in late summer.
Local Knowledge
Hoot-owl restrictions close fishing during hot afternoons in summer. Arctic grayling are special - handle carefully. The upper river is the grayling stronghold.
Local Tips
The Big Hole Valley is authentic Montana ranching country. Arctic grayling are a special treat. Watch for hoot-owl restrictions in summer.
When is the Best Time to Fish Big Hole River?
Spring
Skwala and March browns begin the season.
Summer
Salmonfly hatch in late June. Watch for hoot-owl closures.
Fall
Brown trout become aggressive. Excellent conditions.
Winter
Limited but fishable on mild days.
Access Points & Parking for Big Hole River
Wisdom
Upper river access in the Big Hole Valley.
Divide
Mid-river access.
Melrose
Lower river access with services.
Glen
Lower canyon access.
Spawning Seasons
Please respect spawning fish and their redds. Avoid fishing over actively spawning trout.
Brown Trout
Spawn months: October, November
Night spawning common. Males become very dark with pronounced kype during spawn.
Rainbow Trout
Spawn months: March, April
Resident rainbow trout spawn in smaller tributaries and tend to build smaller redds than steelhead.
Brook Trout
Spawn months: September, October
Males develop vibrant red bellies and white-edged fins during spawning. Early fall spawners.
Big Hole River Fishing Regulations
Season
Open year-round.
Limits
Arctic grayling must be released. Trout limits vary.
Special Regulations
Hoot-owl restrictions may apply. Check FWP.
Bait Restrictions
Artificial flies and lures only.
Notes
Protecting Arctic grayling is critical.
Always verify current regulations with Montana fish and wildlife agency before fishing. Regulations can change annually.
Fly Shops & Guides Near Big Hole River
Local Fly Shops
- Frontier Anglers - Dillon
- Big Hole Lodge
- Complete Fly Fisher
Guide Services
- Frontier Anglers
- Big Hole Guides
- Complete Fly Fisher Guides
Other Rivers You Might Like
Popular forecasts outside Montana—great for trip planning and comparing conditions.
Other Montana Trout Rivers
Bitterroot
Blackfoot
Yellowstone (inside YNP)
Madison
Missouri (below Holter)
Big Hole River — frequently asked questions
When is the best time to fish the Big Hole River?
PRIME MONTH. Salmonfly and stonefly hatches.
What flies should I bring to the Big Hole River?
For the Big Hole River (freestone), carry: Salmonfly, Golden Stone, Elk Hair Caddis, Hopper, Skwala.
What water temperature is best for trout on the Big Hole River?
On the Big Hole River, trout hold between 50° and 65°F. In summer, expect temps to swing with air temperature — fish early.
Do I need a fishing license for the Big Hole River?
Yes — you need a valid Montana fishing license to fish the Big Hole River. Local season: Open year-round.. Daily limit: Arctic grayling must be released. Trout limits vary..
What hatches should I watch for on the Big Hole River in June?
Salmonfly is the signature hatch on the Big Hole River in June. Match size and adjust leader size to 5X-6X. The fish key in on the emergence during low-light hours, so plan to be on the water at first light.
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