Mattole River

Generated artwork: BlueStreamFly · Regional illustration; not the exact location.

Should I go fishing?

Check the water temperature first.

Water temperature is unconfirmed. Use a stream thermometer; stop trout fishing at 70°F or warmer, or sooner if fish show stress.

Rating updatedRiver local time: Sep 11, 2026, 10:21 PM PDT

Why this recommendation?

USGS shows 8 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (2001-2025, 25 readings) show a typical middle range of 5 cfs to 8 cfs. Flow is within the typical range for this date, so weather, temperature, and access become the next checks.

Available live dataHighHow much of the live flow, weather, and alert data came back.

Confidence in this recommendationMediumWater temperature not verified; do not use this score to clear warm-water risk.

Usually checks again about every 45 minutes

If you go

Check first: Use RiverReports for a quick chart and 11468900 for official USGS context.
Try: Check open status before leaving home, then match the gauge to clarity when you arrive.
Leave when: Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.

Flow and weather

Showing server-checked river conditions while current readings refresh.

Flow: 7.83 cfs; From the latest stored river check. Open the official source for the newest reading.
Air forecast: 58°F
Next 24h high: 70.0°F
NWS air forecast near Sep 12, 2026, 1:00 PM PDT
Rain chance: 0%

This is an air forecast, not a river-temperature reading. Check the water with a stream thermometer before fishing in hot weather.

RiverReports preview · current series loading

Recent flow

RiverReports gauge

Mattole River flow chart from RiverReports

Showing the available RiverReports chart while the current structured flow series loads. Check the chart on RiverReports Opens in a new tab.

Latest stored weather check

Mostly Cloudy

Wind: 2 mph
Weather checked: Sep 11, 2026, 10:00 PM PDT

More forecast and source details

Mostly Cloudy

National Weather Service

Mattole River forecast point

The National Weather Service forecast is temporarily unavailable.

Live data

Where these readings come from

RiverReports gauge: Mattole River near Ettersburg

Official USGS station Opens in a new tab.RiverReports gauge Opens in a new tab.Official NWS forecast Opens in a new tab.

These values are from the latest server-checked river data. JavaScript can refresh them with newer readings. Use the official links below for the newest readings before you fish.

Flies for this time of year

Seasonal starting points, not a live hatch report. Match what you see on the water.

See flies for every season

SeasonWhat to look forFlies to try

Winter

What to look forSparse midges, winter stones, salmonid eggs where legal, and baitfish movement

Flies to try

Small black stoneBlack Stonefly Patterns egg pattern where legalEgg Fly Patterns soft hackleSoft-Hackle Wet Flies black leechLeech Patterns small baitfishBaitfish and Minnow Patterns

Spring

What to look forBWOs, caddis, small mayflies, sculpins, and fry movement

Flies to try

BWO emergerBlue-Winged Olive Patterns caddis pupaCaddis Pupa Patterns soft hackleSoft-Hackle Wet Flies sculpinSculpin Patterns small clouserClouser Deep Minnow

Summer

What to look forTerrestrials, caddis, midges, warmwater forage, and estuary bait

Flies to try

Foam antAnt Patterns small caddisCaddis Patterns by Stage popperBass and Panfish Popper Patterns baitfish streamerBaitfish and Minnow Patterns

Also try crayfish

FallThis season

What to look forFirst rain pulses, small olives, caddis, and salmonid migration cues

Flies to try

Soft hackleSoft-Hackle Wet Flies BWOBlue-Winged Olive Patterns small streamerTrout Streamer Patterns muddlerMuddler Minnow sparse steelhead wet flySteelhead Wet, Spey, and Hairwing Patterns

Each fly name opens its matching Fly Box guide.

More fishing tips

Methods, fish species and trip notes

How to fish Mattole River today.

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.

Wading, bank fishing or floating?

Access choicesNo single best option

Wading, Bank fishing, and Floating have the same top score. Use current access, footing, weather, and local rules to choose.

Wading92/100

Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.

Bank fishing92/100

Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.

Floating92/100

A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.

Full river report

Is Mattole River worth the trip today? Check flow, weather, hatches, access, and rules for California before you go.

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.

Fishing words used on this page

U.S. Geological Survey (USGS) gauge: A USGS gauge is an official river station that measures flow or water height.
Cubic feet per second (cfs): Cubic feet per second, or cfs, shows how much water passes the gauge each second.
Blue-winged olive (BWO): Blue-winged olives, or BWOs, are small mayflies that often hatch in cool or cloudy weather.
Caddis: Caddis are small water insects. The adults look a little like tiny moths.
Emerger: An emerger copies an insect as it rises from below the water toward the surface.
Midge: Midges are tiny flies and a common trout food, especially in cold water.
Soft hackle: A soft-hackle fly has moving fibers that can look like an insect rising through the water.
Streamer: A streamer is a fly that looks like a small fish, leech, or other swimming food.
Terrestrial: Terrestrials are land insects, such as ants, beetles, and grasshoppers.

Why this call

Why this score

FlowHelps

SeasonHelps

September to April: Low-flow rules can open or close North Coast salmonid water during this period.

WeatherHelps

The current NWS air forecast is about 58F, and the next 24-hour high reaches about 70F. Mostly Cloudy.

Public alertsHelps

No active NWS alert was returned for this forecast point.

Fishing usefulnessHelps

Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.

Trip notes

Check these before you choose a reach.

Best flows

Open under CDFW low-flow rules, dropping after rain, and clear enough to fish without stressing salmonids.

When to leave

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.

Mattole River access and rules.

Use these places as starting points. Open the access link below and check posted signs before you park or enter.

Before you go

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

Where to access the river

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.

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.
Confirm parking, land ownership, and current agency notices before relying on any access point.
Narrow roads, stream crossings, heavy rain, landslides, cold water, and limited services

If this water does not fit the day, check another report before you start the drive.

CaliforniaMattole River at Petrolia fishing reportLower Mattole and estuary-adjacent planning.

CaliforniaMain Fork Eel River fishing reportRemote inland Eel context.

CaliforniaNoyo River fishing reportAnother Mendocino/North Coast low-flow-rule river.

See all California fly fishing reports

Sources and report details

Official agencies and primary river operators come first. Secondary tools are labeled so you know what carries the most weight.

Rules and closures

Check what is allowed, where the rule applies, and whether the river is open.

Fishing rulesOfficial agencyCDFW low-flow fishing regulationswildlife.ca.gov (opens in a new tab)

Flow and weather

Check the latest river reading and forecast before you leave.

SafetyOfficial agencyNWS forecast point near Mattole Riverforecast.weather.gov (opens in a new tab)

Access and land

Check public entry points, land rules, and seasonal access changes.

Public accessOfficial agencyBLM King Range National Conservation Areablm.gov (opens in a new tab)

Rules and closures

Check what is allowed, where the rule applies, and whether the river is open.

Fishing rulesOfficial agencyCDFW low-flow fishing regulationswildlife.ca.gov (opens in a new tab)

What this source covers

Open the current rules and check the river section, season, and special limits.

Fishing rulesOfficial agencyCDFW steelhead report and restoration cardwildlife.ca.gov (opens in a new tab)

What this source covers

Open the current rules and check the river section, season, and special limits.

Flow and weather

Check the latest river reading and forecast before you leave.

SafetyOfficial agencyNWS forecast point near Mattole Riverforecast.weather.gov (opens in a new tab)

What this source covers

Open this page and check the latest safety advice before your trip.

River readingOfficial agencyUSGS monitoring location: Mattole River near Ettersburgwaterdata.usgs.gov (opens in a new tab)

What this source covers

Open this river reading to check the latest level, flow, and update time.

River readingSecondary river toolRiverReports: Mattole River near Ettersburgriverreports.com (opens in a new tab)

What this source covers

Open this river reading to check the latest level, flow, and update time.

Access and land

Check public entry points, land rules, and seasonal access changes.

Public accessOfficial agencyBLM King Range National Conservation Areablm.gov (opens in a new tab)

What this source covers

Open the land or access page, then check signs before you park or enter.

Quick questions

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.

Mattole River

Check the water temperature first.

If you go