Pennsylvania / Northeast
Clarion River
A Clarion River report for Cooksburg flows, smallmouth, upper trout context, water-trail logistics, hatches, and PFBC source checks.
Image: Clarion River (US 332) 2018-10-30 055 / CC BY-SA 4.0 / Chris LightFishability now: Clarion River fishability today
GreatData confidence: High96/100
Fishable now because Cooksburg gauge is falling, weather is usable, and no public alert is active.
Flow observed
5:00 PM UTC
Weather observed
5:00 PM UTC
Score calculated
5:24 PM UTC
Why this rating
Flow
Weather
Public alerts
Next 6-12 hours
Improving / hold
A falling gauge and usable weather should keep the next 6-12 hours in play unless tributaries stain or heat builds.
USGS flow
806 cfs
Current trend: flow falling, rating likely holding strong unless weather or clarity changes.
More planning details: flies, flow bands, and live source checks
Fish it today
Start here
Start with the Cooksburg gauge, PFBC water-trail guidance, current regulations, and one realistic access or float plan. Decide whether the day is mainstem smallmouth, upper trout, or a mixed scout before rigging.
Best flow clue
Use USGS 03029500 at Cooksburg for the mainstem plan and USGS 03028500 at Johnsonburg for upper-river context. Stable readable flow is best; high water, poor exits, or warm trout conditions should change the plan.
Skip trigger
Skip or pivot when mainstem flow is pushy, strainers or boat logistics are not sorted out, water is too warm for trout handling, storms are nearby, or trout reach rules are not confirmed.
Flow decision bands
Stable mainstem window
Stable Cooksburg flow can support a mainstem smallmouth, selective trout, or float plan when the target reach matches the conditions.
Best Cooksburg trend
A steady or slowly falling Cooksburg trend with manageable weather is the clearest signal for a practical Clarion day.
High water or poor exits
Pushy mainstem water, strainers, or weak takeout planning should move the day to banks, a shorter scout, or another stream.
Warm trout or method mismatch
Warm water may shift the day away from trout, while a poor float or wade setup should change the method before changing flies.
USGS flow
806 cfs
Current trend: flow falling, rating likely holding strong unless weather or clarity changes.
Live USGS flow
806 cfs / falling about 25%
Live NWS forecast
73F / Sunny
Water temperature not verified
Heat guidance uses weather and river type unless an official water-temperature value is available.
No NWS alert flag
No active NWS alert was returned for this forecast point.
USGS 03029500 is the best mainstem gauge for this page.
Use PFBC water-trail sources for ramps, float distance, and public logistics.
Smallmouth tactics are often more realistic in warm periods than forcing a trout-only plan.
Trout-specific language should be tied to upper or West Branch sections, not the whole river.
Editorial review
How this report is maintained
This Clarion River report is maintained from Pennsylvania Fish and Boat Commission regulations, PFBC trout classification information, PFBC Clarion water-trail access guidance, USGS Cooksburg and Johnsonburg flow data, weather, media-credit, and western Pennsylvania mainstem planning sources.
Byline
BlueStreamFly editorial team
Reviewed by
BlueStreamFly source review
Maintained by
Mountain Brook Run LLC
Last material review
2026-06-01
Report confidence
Good confidence
88/100
Good confidence: Pennsylvania regulations, PFBC water-trail access, trout classification context, USGS Cooksburg and Johnsonburg flow support, weather coverage, image credit, and route-specific mainstem planning support the page. Confidence is moderated by broad river scope, float logistics, warm-water timing, and current river hazards.
Regulations
Pennsylvania fishing regulations and PFBC trout classification sources support the current rule-check path.
Access
PFBC Clarion water-trail information provides a strong public access and float-planning framework.
Flow and weather
USGS 03029500 at Cooksburg, USGS 03028500 at Johnsonburg, and the National Weather Service point provide strong planning support for flow, weather, and safety decisions.
Fishing usefulness
The page now separates mainstem flow, upper-river context, trout versus smallmouth decisions, float logistics, high-water skips, and backup-water choices.
Fishability dashboard and source review
2026-06-01 / material content or source review
Pennsylvania fishing regulations, PFBC Clarion water-trail information, PFBC trout classification information, USGS 03029500 at Cooksburg, USGS 03028500 at Johnsonburg, the National Weather Service point, and image credit were checked before updating the current-fishability decision layer.
2026-06-01
Updated Clarion River to the current fishability-page standard with mainstem flow bands, water-trail access cards, backup cues, stable fishability SEO, and confidence signals.
2026-05-28
Added mainstem-versus-trout-reach trip fit, Cooksburg flow planning, float and wade safety guidance, water-trail access nuance, smallmouth and trout decision cues, backup-water suggestions, editorial review signals, and a page-specific report-confidence meter after source review.
2026-05-25
Initial source-reviewed report published with flow, weather, hatches, flies, tactics, access, regulations, and FAQs.
Angler planning edge
Local details that change the plan
Best for
Western Pennsylvania anglers planning Clarion River mainstem smallmouth, selective trout, water-trail, boat, or wade days around Cooksburg flow, Trips where PFBC rules, trout classification context, water-trail access, big-river safety, and float logistics need a check, Streamer, popper, nymph, and soft-hackle plans when the target reach and water temperature match the species, Anglers comparing Clarion River with Allegheny River, Oil Creek, or Slippery Rock Creek before choosing a western Pennsylvania plan
Wade or float
Treat the Clarion as a mainstem river with reach-specific trout context. Cooksburg flow, water-trail logistics, boat traffic, and water temperature should decide whether to wade, float, or choose a smaller trout stream.
Best flows
Use USGS 03029500 at Cooksburg for the mainstem plan and USGS 03028500 at Johnsonburg for upper-river context. Stable readable flow is best; high water, poor exits, or warm trout conditions should change the plan.
When to skip
Skip or pivot when mainstem flow is pushy, strainers or boat logistics are not sorted out, water is too warm for trout handling, storms are nearby, or trout reach rules are not confirmed.
Local plan
Start with the Cooksburg gauge, PFBC water-trail guidance, current regulations, and one realistic access or float plan. Decide whether the day is mainstem smallmouth, upper trout, or a mixed scout before rigging.
Pressure
Pressure follows state-forest travel, paddling seasons, and easy access near Cooksburg. A clean float plan or a smaller legal trout reach can beat crowding on obvious banks.
Access nuance
PFBC water-trail guidance gives useful access structure, but launch, takeout, parking, private banks, and current river hazards still need current confirmation.
Backup water
If the Clarion is high, crowded, too warm, or logistically awkward, compare the Allegheny River for a larger tailwater plan, Oil Creek for smaller trout water, or Slippery Rock Creek for a different western Pennsylvania option.
About the river
Setting, character, and why it fishes the way it does.
The Clarion River is one of western Pennsylvania's classic forested river corridors. It has a water-trail identity, smallmouth water, scenic float sections, and trout context in upper or branch reaches.
For fly anglers, that means the right report should not promise one uniform fishery. Around Cooksburg, think in terms of flows, float logistics, smallmouth structure, and safe access. Trout water exists, but it is more specific by reach.
The best first trip is usually a conservative float or bank plan with smallmouth flies, plus a trout backup if cold-water sections and rules line up.
Target species
Smallmouth bass
A primary mainstem fly target through the warmer months.
Brown and rainbow trout
More reach-specific; check PFBC rules and upper or branch water before planning a trout day.
Walleye and other warmwater fish
Part of the broader river mix, especially below classic trout sections.
Reading the water
Stable medium flow
Fish boulder edges, ledges, shade banks, and current breaks with streamers, nymphs, and crayfish.
Low clear summer flow
Use smaller streamers, poppers, long casts, and early or late light.
High water
Shift to safe banks, boat planning, or a smaller backup creek.
Cool spring/fall water
Bring trout nymphs and soft hackles for upper sections where legal and practical.
Best seasons
Spring
Good for trout context, streamers, and pre-summer smallmouth movement.
Summer
Mainstem smallmouth is often the best fly plan.
Fall
Cooling water helps streamers, smallmouth, and reach-specific trout tactics.
Winter
Limited practical mainstem fly fishing; focus on conditions and safety.
USGS flow
Clarion River at Cooksburg
This is the fallback for rivers that are not covered by RiverReports. Use the official USGS monitoring page for the live hydrograph, station metadata, and current water trend.
Open USGS gaugeUSGS data chart
Clarion River at Cooksburg
Streamflow over the latest USGS reporting window.
Latest
806 cfs
Jun 3, 5 PM UTC
Weather
River weather report
Weather can change wading safety, road access, water temperature, hatches, and the best time of day to fish.
Live forecast loads as you reach this section
This keeps the report fast while still using the official National Weather Service forecast point.
Hatches and flies
Hatch chart and fly picks
January to March
Midges, little black stones, BWOs, and slow nymph windows
Zebra midge, black stonefly nymph, BWO emerger, perdigon, small egg
April to June
Hendricksons, March Browns, sulphurs, caddis, BWOs, and spinner falls
Hendrickson, March Brown, sulphur emerger, caddis pupa, pheasant tail
July to September
Tricos where present, ants, beetles, hoppers, and shade-line terrestrials
Trico, ant, beetle, small hopper, dry-dropper, small jig nymph
October to December
BWOs, midges, caddis remnants, and streamer windows after rain
BWO emerger, zebra midge, soft hackle, olive bugger, sculpin
Nymphs
Perdigon, pheasant tail, hare's ear, zebra midge, stonefly
Use in riffles, buckets, and pocket water before fish commit to the surface.
Dries
BWO, caddis, sulphur, PMD, ant, beetle, small hopper
Use during visible hatches, spinner falls, or clear low-water sight fishing.
Streamers
Sculpin, leech, olive bugger, crayfish, small baitfish
Use on bumps in flow, cloudy days, and deeper banks with cover.
Warmwater flies
Clouser, crayfish, hellgrammite, popper, slider
Use on the mainstem when smallmouth are the better target than trout.
Tactics
How to fish it
Pick the fishery first: mainstem smallmouth, upper trout, or float-and-scout day.
For smallmouth, work crayfish and baitfish patterns along ledges, shade, and current breaks.
For trout-context water, use nymphs and soft hackles only where the reach and temperature support it.
Use poppers in low-light summer windows when smallmouth are looking up.
Avoid long wades in pushy mainstem flows.
Rigging
Rod, leader, and setup notes
A 6-weight is the best all-around Clarion mainstem rod.
Carry a floating line and a light sink tip if streamers are part of the plan.
Use 0X to 2X for bass streamers and 4X to 5X for trout sections.
Bring a boat or shuttle plan before committing to long water-trail distances.
Access
Access and planning notes
Cooksburg and Johnsonburg gauges
Mainstem and upper-river decisionWade / float / trail
USGS gauge stack
When to pick it
Start here when reach choice depends on the mainstem trend plus upper-river context.
Caution
Gauge context does not replace checking strainers, exits, launches, and the species fit for the section.
PFBC Clarion water trail
Float and access planWade / float / trail
Water trail / float / bank
When to pick it
Use it when launch, takeout, and corridor access are part of the fishability decision.
Caution
Confirm current hazards, parking, private banks, and takeout timing before floating.
Mainstem versus trout reach
Species and method filterWade / float / trail
Wade / float / bank
When to pick it
Pick this when the river is fishable but the best plan depends on smallmouth, trout, or mixed scouting.
Caution
Do not stretch a trout plan into warm mainstem water when another target or river fits better.
The Clarion is a better page when it separates mainstem smallmouth from reach-specific trout reach details.
Use water-trail access and current conditions before planning a float.
Remote banks and strainers can turn a casual float into a safety issue.
Regulations
Check before fishing
Check the PFBC summary book and water-specific rules before fishing. Trout and warmwater rules differ by reach and season.
Primary base
Cooksburg, Clarion, or Cook Forest
Best day style
Water-trail, state-forest, boat, and selective wade access
Check first
Cooksburg flow, PFBC water trail, trout reach rules, weather, and float logistics
Safety
Big-water wading, strainers, remote banks, boat traffic, and cold spring flows
Gear
Helpful gear for this water
Four or five-weight rod
Covers most dry-fly, nymph, and dry-dropper work.
Six-weight or streamer rod
Useful for wind, higher water, and larger flies.
Thermometer
Use it before catch-and-release trout fishing in warm weather.
Wading staff
Helpful on slick bedrock, pocket water, and pushy tailwater edges.
Barbless-hook box
Speeds handling on wild trout and special-regulation water.
Nearby water
Other water to research
Backup logic
High water
Wait for a safer trend or compare Oil Creek or Slippery Rock Creek for smaller-water options.
Warm trout conditions
Switch to a smallmouth plan where legal and appropriate, or choose a colder trout stream.
Float logistics
Use bank water or another river if launch, takeout, or shuttle details are not solid.
Crowding
Use a second water-trail access or move to the Allegheny or Oil Creek before forcing a busy bank.
Allegheny River
A larger tailwater and big-river fly option west of the Clarion.
Pine Creek
A Pennsylvania trout and smallmouth comparison water with canyon access.
Laurel Hill Creek
A smaller western Pennsylvania trout stream when mainstem flows are too high.
FAQ
Fast answers
Is Clarion River fishable today?
Clarion River looks very fishable right now. The live score is 96/100, based on current flow, weather, public alerts, and the report's planning context. Recheck the linked gauge and forecast before leaving because conditions can change quickly after rain, heat, access changes, or flow swings.
What flow is best for Clarion River?
Use USGS 03029500 at Cooksburg for the mainstem plan and USGS 03028500 at Johnsonburg for upper-river context. Stable readable flow is best; high water, poor exits, or warm trout conditions should change the plan.
When should I skip Clarion River?
Skip or pivot when mainstem flow is pushy, strainers or boat logistics are not sorted out, water is too warm for trout handling, storms are nearby, or trout reach rules are not confirmed.
Is Clarion River safe to wade right now?
The fishability score is not a wading guarantee. Wade only where your chosen access has safe edges, clear footing, legal entry, and no forced crossings; high, rising, stained, or storm-affected water should be treated conservatively.
What should I check first before fishing the Clarion River?
Check USGS 03029500 at Cooksburg, then decide whether your day is a mainstem smallmouth plan or a reach-specific trout plan.
Where should a first-time visitor start on the Clarion River?
Start around Cooksburg and the PFBC water trail for mainstem orientation.
Can I wade the Clarion River?
Some wading is possible, but the Clarion is a mainstem river. Treat higher flows as boat or bank-only conditions.
What flies should I bring for the Clarion River?
Bring the seasonal fly box, a few confidence nymphs or streamers, and enough tippet to change when flow, clarity, temperature, or pressure changes.
Sources
Source set for this report
Reviewed 2026-06-01