Fly fishing report · West

Mattole River

Mattole River planning with RiverReports flow, official USGS backing, CDFW regulation checks, NWS weather, access notes, hatch timing, fly picks, and practical safety guidance.

Check flow & weather

Today's river scoreHigh source confidence

Caution

Best option: Float.

A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.

Updated Jul 13, 11:17 PM UTCUsually refreshes about every 45 minutes

Recommended approachFloat

Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.

Wade44/100

Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.

Bank / edge56/100

Bank and edge fishing is the safer default when water is high, pushy, or not fully verified.

Float · Best fit68/100

A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.

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.

River strategy

Treat this as a regulation-first coastal river day.

Mattole River 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 11468900 for official USGS context.
CDFW low-flow status, King Range road conditions, USGS flow, and coastal forecast
BLM King Range sources describe steep, winding roads and Mattole-area access, so the day should be planned around travel conditions as much as river flow.
Carry a valid California license and steelhead report card when the target requires it.

Why this score moved

HeatLowers score

The NWS forecast is near 94F. Without live water temperature, heat risk needs a conservative check.

Best mode nowUse caution

Float: A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.

FlowHelps score

USGS shows 21 cfs with a stable over about 6 hours trend. same-date USGS history (2001-2025, 25 readings) puts the normal middle range around 15 cfs-30 cfs. Flow is inside the same-date normal range, so weather, temperature, and access become the next checks.

SeasonHelps score

Summer: Often more of a scouting, warmwater, surf, or estuary-adjacent planning season than a trout or steelhead season.

Public alertsHelps score

No active NWS alert was returned for this forecast point.

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 during closures, muddy storm pulses, hot low water, or unclear access conditions.

Open and dropping flow

Best for careful winter steelhead searching.

Heavy rain

Road and stream-crossing safety can fail before the fishing plan does.

Low-flow closure risk

Check CDFW before fishing during the closure season.

Clear low water

Use sparse flies and avoid pressuring visible salmonids.

Field plan

Fish it with intention.

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, Honeydew, or Shelter Cove approach is the practical base. Check cdfw low-flow status, king range road conditions, usgs flow, and coastal forecast, 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

Reviewed family · report says “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

Reviewed family · report says “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

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 family · report says “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

Reviewed family · report says “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

Reviewed family · report says “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

Reviewed family · report says “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

Reviewed family · report says “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

Check open status before leaving home, then match the gauge to clarity when you arrive.

Swing sparse flies or small streamers through soft traveling lanes only when the river is legal and fishable.

Avoid redds, staging fish, and crowded slots; these rivers depend on careful handling.

Keep a backup plan because coastal rivers can close or blow out quickly.

Access & responsibility

Know the entry. Know the exit.

Check CDFW low-flow rules, current sport fishing regulations, and steelhead report-card requirements before fishing. Open status can change during the season.

Honeydew / Ettersburg orbit

Useful middle-river planning area; confirm road and land status.

King Range NCA approaches

BLM describes narrow, steep, winding access roads and Mattole-area destinations.

Mattole Beach / lower river context

A separate lower-river plan with its own gauge and access concerns.

Transparent sources

Check the facts behind the plan.

Last material review: 2026-05-31

flowRiverReports: Mattole River near Ettersburg flowUSGS monitoring location: Mattole River near Ettersburg safetyNWS forecast point near Mattole River regulationCDFW low-flow fishing regulations regulationCDFW steelhead report and restoration card backgroundCDFW North Coast Salmon Project accessBLM King Range National Conservation Area backgroundBLM lower Mattole restoration backgroundGenerated regional Mattole River planning image

Common questions

Before you leave.

Is Mattole River 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 11468900 as the official flow source or context source.