Wade · Best fit61/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
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Fly fishing report · Northeast
Clarion River
A Clarion River report for Cooksburg flows, smallmouth, upper trout context, water-trail logistics, hatches, and PFBC source checks.
Check flow & weatherToday's river scoreHigh source confidence
61
Caution
Best option: Wade.
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
Updated Jul 13, 11:17 PM UTCUsually refreshes about every 45 minutes
Recommended approachWade
Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.
Bank / edgeCheck
This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
Float61/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Confirm before you leave
Flow and weather right now.
Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.
Loading current flow and weather.
River strategy
This page is a mainstem Clarion plan with trout context, not only a trout creek page.
The Clarion around Cooksburg is best treated as a mixed fly-fishing river: smallmouth and float planning matter, while trout opportunity is more reach-specific upstream or in special sections. Use the Cooksburg gauge for the mainstem plan.
- 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.
Why this score moved
FlowUse caution
USGS shows 832 cfs with a stable over about 6 hours trend. same-date USGS history (1939-2025, 87 readings) puts normal around 447 cfs and the upper quartile near 780 cfs; today's flow is high for the date. Fishable water may exist, but do not rate it highly without a safe access, clarity, and wading or boat plan.
HeatUse caution
The NWS forecast is near 84F. Fish early and verify water temperature where trout stress is possible.
Best mode nowUse caution
Wade: Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
SeasonHelps score
Summer: Mainstem smallmouth is often the best fly plan.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Read the water
What changes the plan.
Stable, clear flows make the mainstem better for smallmouth and streamer work. Cooler spring and fall windows can bring more trout-style tactics into the plan.
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.
Field plan
Fish it with intention.
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.
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.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
January to MarchMidges, little black stones, BWOs, and slow nymph windowsZebra midge, black stonefly nymph, BWO emerger, perdigon, small egg
Reviewed pattern · report says “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗
Reviewed family · report says “black stonefly nymph”Black Stonefly PatternsBlack stonefly wording is a color and insect-group label, not one exact recipe. Size, nymph versus adult stage, wing profile, and weighting must remain explicit.See family guide ↗+ 3 more reviewed guides in the Fly Box April to JuneHendricksons, March Browns, sulphurs, caddis, BWOs, and spinner fallsHendrickson, March Brown, sulphur emerger, caddis pupa, pheasant tail
Reviewed family · report says “Hendrickson”Hendrickson PatternsHendrickson is a hatch name. Nymphs and emergers, upright or low-riding duns, and rusty spent spinners are different fly jobs.See family guide ↗
Reviewed family · report says “March Brown”March Brown Dry FliesThis family includes traditional hackled, parachute, and Comparadun-style March Brown dries. Each exact construction rides differently and should be named when known.See family guide ↗+ 3 more reviewed guides in the Fly Box July to SeptemberTricos where present, ants, beetles, hoppers, and shade-line terrestrialsTrico, ant, beetle, small hopper, dry-dropper, small jig nymph
Reviewed family · report says “Trico”Trico PatternsTrico is a hatch family. Sparse nymphs and emergers fish below or in the film; duns and clustered or individual spinners use different surface silhouettes.See family guide ↗
Reviewed family · report says “ant”Ant PatternsAnt patterns can be foam, fur-bodied, winged, or sunken. The narrow waist and paired body lobes matter more than one material recipe.See family guide ↗+ 3 more reviewed guides in the Fly Box October to DecemberBWOs, midges, caddis remnants, and streamer windows after rainBWO emerger, zebra midge, soft hackle, olive bugger, sculpin
Reviewed family · report says “BWO emerger”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗Reviewed pattern · report says “zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box 01
Pick the fishery first: mainstem smallmouth, upper trout, or float-and-scout day.
02
For smallmouth, work crayfish and baitfish patterns along ledges, shade, and current breaks.
03
For trout-context water, use nymphs and soft hackles only where the reach and temperature support it.
04
Use poppers in low-light summer windows when smallmouth are looking up.
05
Avoid long wades in pushy mainstem flows.
Access & responsibility
Know the entry. Know the exit.
Check the PFBC summary book and water-specific rules before fishing. Trout and warmwater rules differ by reach and season.
Cooksburg corridor
Primary mainstem flow and access orientation for this page.
Clarion River water trail
Use PFBC resources for ramps, float distances, and trip timing.
Upper/West Branch trout context
Treat these as separate rule checks, not the same plan as the lower mainstem.
Transparent sources
Check the facts behind the plan.
Last material review: 2026-06-01
Common questions
Before you leave.
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.