Generated mountain tailwater and sage valley scene representing the Williams Fork near Parshall, not an exact location photo
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Fly fishing report · West

Williams Fork

Is Williams Fork worth the trip today? Check flow, weather, hatches, access, and rules for Colorado before you go.

See the flow chart ↓

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

Good day to fish?Latest river check
Good fishing

Yes. Fishing looks good.

Good fishing based on the verified flow and weather. No official live water-temperature reading is available. Carry a thermometer during warm weather and stop if the water is stressful for trout.

See update time and confidence
Live data checkHighHow much of the live flow, weather, and alert data came back.
Today's callMediumWater temperature not verified; do not use this score to clear warm-water risk.
Score calculated Aug 22, 2026, 10:27 PM MDTUsually checks again about every 45 minutes
Access choicesNo clear best mode

Wade and Bank / edge have the same top score. Use current access, footing, weather, and local rules to choose.

Wade73/100

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

Bank / edge73/100

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

FloatNot recommended

This report does not recommend floating this reach.

Your plan

Today's Williams Fork plan.

The lower Williams Fork fishes like a regulated tailwater below the reservoir, while reservoir shoreline use and the upper Williams Fork valley have very different access and water behavior. The best report for this generic route is the lower river near Parshall, where the gauge and public access line up cleanly.

Check first
Use RiverReports and USGS 09038500 because that station sits just below the reservoir and is the right lower-river flow reference.
Try
Build the day around the lower-river access pieces first, then decide whether a reservoir-side stop adds anything useful.
Leave when
Skip when releases are too high for comfortable edge fishing, when the valley wind is punishing, or when access is more constrained than expected.

Live river check

What the river is doing

Check the latest flow and weather before you go. A quick change can make the river harder or less safe to fish.

Showing the latest stored river check while current readings load.
Flow
72 cfs
From the latest stored river check. Open the official source for the newest reading.
Air now
62°F

Current NWS forecast period

Next 24h high
76.0°F

NWS air forecast near

Rain chance
30%

For this forecast period

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

Latest stored weather check

Chance Rain Showers

Chance Rain Showers

Wind
6 mph
Weather checked

Recent flow chart is loading

The latest stored reading is shown above. Check the official source below if you need the newest value now.

More forecast and source details
National Weather Service

Williams Fork Reservoir forecast point

The National Weather Service forecast is temporarily unavailable.

Live data

Where these readings come from

RiverReports gauge: Williams Fork below Williams Fork Reservoir

How to fish it

How to fish Williams Fork today.

The lower Williams Fork is usually most dependable when reservoir releases are stable and the public-access pieces are clear. It rewards small-fly patience and realistic expectations about how much legal water you can cover on foot.

01

Low clear release

Use fine tippet, smaller nymphs, and careful approach angles on obvious holding water.

02

Stable medium release

Best condition for classic nymphing, soft-hackle swings, and occasional dry windows.

03

Higher release

Fish bank seams and softer inside water, and do not force crossings in a controlled tailwater.

04

Warm windy afternoons

Fish early and keep a backup plan if reservoir and valley wind make presentations sloppy.

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.
Nymph
A nymph is a young water insect. Anglers also use the word for a fly that copies it.
Presentation
Presentation means how you cast and move the fly so it looks natural to a fish.
Seam
A seam is the line where fast and slow water meet.
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.
Dry-dropper
A dry-dropper rig has a floating fly with an underwater fly tied below it.
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.
Why this call

Why this score

FlowUse caution

USGS shows 72 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1949-2025, 73 readings) show a median near 165 cfs and a low-water marker near 73 cfs; today's flow is unusually low for the date. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.

SeasonHelps

Summer: A strong lower-tailwater window when early starts beat heat, crowds, and afternoon wind.

WeatherHelps

The current NWS air forecast is about 62F, and the next 24-hour high reaches about 76F. Chance Rain Showers.

Public alertsHelps

No active NWS alert was returned for this forecast point.

Fishing usefulnessHelps

Skip when releases are too high for comfortable edge fishing, when the valley wind is punishing, or when access is more constrained than expected.

Trip notes

Trip notes

Check these before you choose a reach.

Best flows

Stable controlled releases that leave visible seams and safe edge water without turning the whole area into pushy bank water.

When to leave

Skip when releases are too high for comfortable edge fishing, when the valley wind is punishing, or when access is more constrained than expected.

Local plan

Check the gauge, start at the SWA, fish one or two prime seams carefully, and only add a reservoir stop if it helps the day instead of complicating it.

Backup water

Colorado River is the most useful nearby backup when the lower Williams Fork is too release-driven or too tight to enjoy.

What to try

Williams Fork flies through the year.

Match the time of year, then let rising fish and current speed guide the next change.

SeasonWhat to look forFlies to try

Each fly name opens its matching Fly Box guide.

Access and safety

Williams Fork access and rules.

Use these places as starting points. Open the access link below and check posted signs before you park or enter. Check the current Colorado fishing brochure before fishing and confirm any SWA entry requirements. Use current CPW and site-specific public-land pages rather than older forum advice or recycled reservoir summaries.

Kemp-Breeze SWA

Primary public lower-river access anchor with clearly mapped boundaries and license/pass requirements.

Williams Fork Reservoir day-use area

Useful for shoreline scouting and access context, but not a substitute for lower-river wading.

Williams Fork Trailhead area

Helpful for upper-valley orientation only. Do not mistake it for lower-tailwater access.

Kemp-Breeze SWA is the strongest lower-river public-access source and includes no-public-access areas that matter on the ground.

Denver Water reservoir rules are separate from lower-river fishing decisions and can change with water levels and parking controls.

The upper-valley trailhead is useful context, but the lower river toward Parshall is the better-scoped fishery for this page.

Compare another river

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

River sources

Official Williams Fork sources.

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

How this report was checked

How this report was checked

Trip guidance checked

What was checked: This report uses official regulation, flow, weather, access, and public-land sources first, then adds practical planning guidance for fly anglers.

Live measurements and forecasts keep their provider timestamps. Rules, access, and trip guidance use the source-review date shown here. BlueStreamFly planning advice is editorial interpretation, not an agency notice.

First-hand experience: BlueStreamFly does not claim a first-hand visit or local field test for this report unless a real contributor is explicitly named and linked.

See all 9 checked sources

Rules and closures

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

Flow and weather

Check the latest river reading and forecast before you leave.

Access and land

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

Source check is old. Last checked . Open the official links now and check for changes.

See something wrong? Report a source problem. Please do not send private spots or private access notes.

Quick answers

Quick Williams Fork answers.

What part of the Williams Fork does this page cover?

It is centered on the lower river below Williams Fork Reservoir toward Parshall, not the reservoir shoreline or upper trail water.

What gauge should I use?

Use RiverReports and USGS 09038500 because that station sits just below the reservoir and matches the lower-river plan.

Is the upper valley the same fishery?

No. The upper trail area, reservoir access, and lower tailwater each need to be planned separately.