Wade · Best fit74/100
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 · West
Mattole River at Petrolia
Mattole River at Petrolia planning with RiverReports flow, official USGS backing, CDFW regulation checks, NWS weather, access notes, hatch timing, fly picks, and practical safety guidance.
Check flow & weatherToday's fishing decisionMost live data available
74
Go now
Mattole River at Petrolia looks fishable right now.
Current USGS flow is 20 cfs and has been stable for about 6 hours. Today's flow is unusually low for this date and below the usual low-water marker near 27 cfs. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
Best supported approachWade
Watch nextFlow: Current USGS flow is 20 cfs and has been stable for about 6 hours. Today's flow is unusually low for this date and below the usual low-water marker near 27 cfs.
Updated Aug 5, 2:51 PM UTCUsually refreshes about every 45 minutes
Best supported approachWade
Compare wading, bank fishing, and floating before choosing how you will fish.
Bank / edge74/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Float74/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Check before you drive
Current flow and weather.
Look at whether the river is rising or falling, then check wind, rain, and storms. These can change both safety and fishing.
Loading current flow and weather.
Before you rely on this report
How current is this report?
Conditions can change quickly. Check these dates before you decide to fish, and open the official source when safety or rules matter.
Priority river · checked more closely for freshness and source changes
- River conditions
- Checked Aug 5, 2026, 10:51 AM
- Fishing guidance
- Reviewed May 31, 2026
- Public access
- No reviewed map pin available
- Rules and closures
- Official rule links checked
High confidence in the current score inputs.
9 sources are listed below for you to open.
3 public access records are listed. Private spots are never shown.
Source checked Jul 30, 2026
Plan your access
Know where you can enter.
These are public parking, launch, trail, or recreation areas—not secret fishing spots. We never show an angler's private pins, notes, or photos here.
- 0
- Shown on map
- 3
- No map pin
Location checkedDescription only
01No map pin
Parking
Petrolia area
Remote lower-river planning base; confirm parking and land status.
Restrictions and seasonal notes
BLM King Range directions identify the Petrolia and Mattole Beach approach, but anglers should verify current road, parking, and land conditions before fishing.
Confirm parking, land ownership, and current agency notices before relying on any access point.
02No map pin
Public land
Mattole Beach / King Range
Use BLM current condition and road information before committing.
Restrictions and seasonal notes
BLM King Range directions identify the Petrolia and Mattole Beach approach, but anglers should verify current road, parking, and land conditions before fishing.
Confirm parking, land ownership, and current agency notices before relying on any access point.
03No map pin
Area description
Lower river bars
Change after storms and can be private or unsafe.
Restrictions and seasonal notes
BLM King Range directions identify the Petrolia and Mattole Beach approach, but anglers should verify current road, parking, and land conditions before fishing.
Confirm parking, land ownership, and current agency notices before relying on any access point.
How to fish it
Treat this as a regulation-first coastal river day.
Mattole River at Petrolia is a North Coast anadromous river where legal status, low-flow rules, and storm timing decide whether a fly day makes sense. Use the live gauge, CDFW low-flow page, and local weather before thinking about flies.
- Use RiverReports for a quick chart and 11469000 for official USGS context.
- CDFW low-flow status, USGS Petrolia flow, King Range road conditions, and coastal weather
- BLM King Range directions identify the Petrolia and Mattole Beach approach, but anglers should verify current road, parking, and land conditions before fishing.
- Carry a valid California license and steelhead report card when the target requires it.
Why the score looks this way
FlowUse caution
USGS shows 20 cfs with a stable over about 6 hours trend. Today's flow is unusually low for this date and below the usual low-water marker near 27 cfs. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
SeasonHelps score
Summer: Often more of a scouting, warmwater, surf, or estuary-adjacent planning season than a trout or steelhead season.
WeatherHelps score
The NWS forecast is about 57F with Sunny.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.
Read the water
What changes the plan.
Best windows come after the river is open under CDFW low-flow rules and the hydrograph is dropping into fishable shape. Skip Mattole River at Petrolia during closures, muddy storm pulses, hot low water, or unclear access conditions.
Dropping lower-river flow
Most useful after storms when the river clears and remains open.
Bar and estuary influence
Lower-river water can behave differently than the upper gauge plan.
Road-impact storms
Skip when roads, crossings, or wind make travel questionable.
Closed or too low
Follow CDFW low-flow updates and leave salmonids alone.
Your trip plan
Know when to go—and when to skip it.
Best flows
Open under CDFW low-flow rules, dropping after rain, and clear enough to fish without stressing salmonids.
When to skip
Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.
Local plan
Petrolia or Ferndale approach is the practical base. Check cdfw low-flow status, usgs petrolia flow, king range road conditions, and coastal weather, then pick a short legal access plan instead of trying to cover the whole river.
Backup water
Check nearby BlueStreamFly reports if the gauge, rules, or weather do not fit the plan.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
WinterSparse midges, winter stones, salmonid eggs where legal, and baitfish movementSmall black stone, egg pattern where legal, soft hackle, black leech, small baitfish
Fly family · report suggests “Small black stone”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 ↗
Fly family · report suggests “egg pattern where legal”Egg Fly PatternsEgg flies are tied to the hook. Round clipped-yarn eggs, sparkly chenille eggs, veiled eggs, single eggs, and clusters differ in material and silhouette; pegged or free-sliding beads are rigs, not fly patterns.See family guide ↗+ 3 more reviewed guides in the Fly Box SpringBWOs, caddis, small mayflies, sculpins, and fry movementBWO emerger, caddis pupa, soft hackle, sculpin, small clouser
Fly family · report suggests “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 ↗
Fly family · report suggests “caddis pupa”Caddis Pupa PatternsCaddis pupa is a life-stage family. Curved bodies, wing pads, legs, beads, and soft-hackle collars differ among exact patterns and must be labeled.See family guide ↗+ 3 more reviewed guides in the Fly Box SummerTerrestrials, caddis, midges, warmwater forage, and estuary baitFoam ant, small caddis, popper, baitfish streamer, crayfish
Fly family · report suggests “Foam 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 ↗
Fly family · report suggests “small caddis”Caddis Patterns by StageCaddis is not one fly. Larvae live below, pupae and emergers rise through the column, tent-wing adults ride or move on top, and spent forms create other silhouettes.See family guide ↗+ 3 more reviewed guides in the Fly Box FallFirst rain pulses, small olives, caddis, and salmonid migration cuesSoft hackle, BWO, small streamer, muddler, sparse steelhead wet fly
Fly family · report suggests “Soft hackle”Soft-Hackle Wet FliesA slim body and sparse webby feather collar define the family. Body material, tail, bead, and insect-specific color create different named patterns.See family guide ↗Fly family · report suggests “BWO”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 ↗+ 3 more reviewed guides in the Fly Box What to carry
Choose flies for the water you expect.
Use the condition that best matches your plan, then open a reviewed guide to identify and fish the pattern.
ApproachFlies to bringWhen it fits
Steelhead and salmonid fliesSparse wet fly, black leech, egg pattern where legal, muddler, small intruder, soft hackleUse only when the river is open, flows are legal, and the reach supports a salmonid plan.
Fly family · report suggests “Sparse wet fly”Steelhead Wet, Spey, and Hairwing PatternsHairwings generally combine a compact body with a swept hair wing. Spey styles emphasize long, flowing body hackle and a low wing. Low-water dressings intentionally reduce material and profile, while marabou patterns use soft, mobile collars or wings. A broad steelhead-wet label does not establish one recipe or construction.See family guide ↗
Fly family · report suggests “black leech”Leech PatternsLeech patterns share an elongated moving silhouette, but material, weighting, hook orientation, and retrieve vary. Pine-squirrel, rabbit-strip, balanced, and Woolly Bugger forms remain separately labeled rather than being presented as one recipe.See family guide ↗+ 4 more reviewed guides in the Fly Box Search streamersSculpin, clouser, olive bugger, black bugger, small baitfishUse on clearing flows, deeper bends, shaded cutbanks, and estuary-influenced water.
Fly family · report suggests “Sculpin”Sculpin PatternsSculpin flies may use muddler heads, cones, dumbbells, jigs, or soft materials. The broad-head, bottom-hugging profile defines the family—not one exact construction.See family guide ↗
Fly pattern · report suggests “clouser”Clouser Deep MinnowThe reviewed chartreuse-and-white form uses sparse layered bucktail with flash around lead barbell eyes. The eyes make the fly sink between strips and ride hook point up; color, eye weight, hook, and saltwater materials must remain labeled.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box Light-water fliesBWO emerger, caddis pupa, soft hackle, small nymph, foam antUse in smaller legal water, soft edges, or when clear low flows demand a subtle presentation.
Fly family · report suggests “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 ↗Fly family · report suggests “caddis pupa”Caddis Pupa PatternsCaddis pupa is a life-stage family. Curved bodies, wing pads, legs, beads, and soft-hackle collars differ among exact patterns and must be labeled.See family guide ↗+ 3 more reviewed guides in the Fly Box 01
Check open status before leaving home, then match the gauge to clarity when you arrive.
02
Swing sparse flies or small streamers through soft traveling lanes only when the river is legal and fishable.
03
Avoid redds, staging fish, and crowded slots; these rivers depend on careful handling.
04
Keep a backup plan because coastal rivers can close or blow out quickly.
Rules & closures
Check the official rules before you go.
Open the agency page to confirm the exact river section, species, season, tackle rules, limits, and emergency closures.
Official links checkedRules for this river or sectionNo special rule found
We did not find a special rule for this river.
We checked the state source but did not find a clearly supported exception for this river. Check the official rules for the exact section you plan to fish.
Rules checkedJul 30, 2026
Report a correction ↗Always follow the official rule
This summary helps with trip planning. The linked agency rule is the one you must follow.
Updates from anglers
What anglers are seeing.
Recent observations from general areas of Mattole River at Petrolia. We review every update before it appears and never publish exact fishing spots, private access details, or photo locations.
Angler updates are not loading right now.
You can still use the river plan above. Check back later for recent observations from other anglers.
Where this report comes from
Open the sources we checked.
Fishing guidance checked: May 31, 2026
Site check: Jul 14, 2026. We regularly test report links, live scores, flow and weather data, and page loading. The content date changes only when the fishing guidance or its sources change.
flowRiverReports: Mattole River near PetroliaflowUSGS monitoring location: Mattole River near PetroliasafetyNWS forecast point near Mattole River at PetroliaregulationCDFW low-flow fishing regulationsregulationCDFW steelhead report and restoration cardbackgroundCDFW North Coast Salmon ProjectaccessBLM King Range National Conservation AreabackgroundBLM lower Mattole restorationbackgroundGenerated regional Mattole River at Petrolia planning image
Common questions
Before you leave.
Is Mattole River at Petrolia usually open for fly fishing?+
Do not assume it is open. North Coast low-flow rules and salmonid protections can close these waters when flows are too low or conditions are stressful.
Should I wade or float?+
Wading from legal access is usually the safer planning baseline. Floating requires current local access knowledge, safe flow, and a realistic takeout.
Which flow source should I use?+
Use the RiverReports chart for a fast read and USGS 11469000 as the official flow source or context source.