Wade4/100
Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.
All California reports
Fly fishing report · West
Tuolumne River
Is Tuolumne River worth the trip today? Check flow, weather, hatches, access, and rules for California before you go.
See the flow chart ↓Generated artwork: BlueStreamFly · Regional illustration; not the exact location.
Good day to fish?Latest river check
Poor
Not today. Make another plan.
39
Best option: Float. A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
See update time and confidence
Live data checkHighHow much of the live flow, weather, and alert data came back.
Today's callHighA verified hard stop is active, so the avoid-or-wait decision is clearer than the fishing score itself.
Score calculated Aug 22, 2026, 9:24 PM PDTUsually checks again about every 45 minutes
Best access methodFloat
These scores compare the risks of wading, bank fishing, and floating.
Bank / edgeNot recommended
This report does not recommend bank fishing on this reach.
Float · Best fit43/100
A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
Water temperature above salmonid stress threshold
Your plan
Today's Tuolumne River plan.
Tuolumne River should be planned around flow, legal access, and the specific reach you intend to fish. The best plan is built around safe flow, legal access, water temperature, and short realistic reaches instead of trying to cover the whole drainage.
- Check first
- Use RiverReports for a quick chart and USGS 11274790 for official flow context.
- Try
- Start with a dry-dropper in broken water before adding weight.
- Leave when
- Skip during sharp rises, hot low water, unsafe crossings, or road and trail uncertainty.
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
- 28 cfs
- From the latest stored river check. Open the official source for the newest reading.Water 70.2°F · 24h high 72.3°F · USGS provisional
- Air now
- 74°F
Current NWS forecast period
- Next 24h high
- 89.0°F
NWS air forecast near
- Rain chance
- 2%
For this forecast period
Latest stored weather check
Clear
Clear
- Wind
- 5 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
Tuolumne River forecast point
The National Weather Service forecast is temporarily unavailable.
Live data
Where these readings come from
RiverReports gauge: Tuolumne River above Hetch Hetchy
Water 70.2°F · provisional · 24h high 72.3°F provisionalWater observed · high observed
How to fish it
How to fish Tuolumne River today.
Best windows come with stable flow, cool water, and access that does not require unsafe crossings. Skip the trip when the gauge rises fast, roads are uncertain, or water is too warm.
Post-snowmelt stable flow
Best for dry-dropper fishing and careful pocket-water travel.
High cold runoff
Unsafe around falls, crossings, and granite channels.
Warm late summer afternoons
Fish early, carry a thermometer, and stop if water is too warm.
Trail-limited access
Choose a short legal reach instead of overcommitting.
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.
- Attractor fly
- An attractor fly is bright or bold. It draws a strike without copying one exact insect.
- 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.
- Pale morning dun (PMD)
- Pale morning duns, or PMDs, are light-colored mayflies that often hatch in warmer months.
Why this call
Why this score
Water temperatureHurts
USGS water temperature is about 70.2F. USGS marks the temperature data provisional and may revise it. Do not pressure trout or salmonids in warm water.
Best mode nowHurts
Float: A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
FlowHelps
USGS shows 28 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (2007-2025, 19 readings) show a typical middle range of 26 cfs to 67 cfs. Flow is within the typical range for this date, so weather, temperature, and access become the next checks.
SeasonHelps
Summer: Best dry-dropper and attractor window, especially early and late before canyon heat builds.
Public alertsHelps
No active NWS alert was returned for this forecast point.
Trip notes
Trip notes
Check these before you choose a reach.
Stable, clear, cool water with safe crossings and enough depth to hold trout in pockets.
Skip during sharp rises, hot low water, unsafe crossings, or road and trail uncertainty.
Tuolumne Meadows, Hetch Hetchy, or Groveland approach is the practical base. Check yosemite fishing rules, road and trail status, usgs flow, and water temperature, then pick a short legal access plan instead of trying to cover the whole river.
Check nearby BlueStreamFly reports if the gauge, rules, or weather do not fit the plan.
What to try
Tuolumne River 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
Spring
What to look forLittle stones, BWOs, caddis, and runoff-edge nymph movement
Early summer
What to look forCaddis, PMDs, yellow sallies, and attractor dry-fly windows
Late summerCurrent
What to look forTerrestrials, ants, beetles, hoppers, and evening caddis
Fall
What to look forBWOs, midges, October caddis, and small streamer windows
Each fly name opens its matching Fly Box guide.
Access and safety
Tuolumne River access and rules.
Use these places as starting points. Open the access link below and check posted signs before you park or enter. Check current CDFW inland trout rules plus park, forest, or BLM notices before fishing. Rules can vary by reach and season.
Tuolumne Meadows and upper river
Check seasonal road, trail, and park fishing rules before planning.
Grand Canyon of the Tuolumne
Remote canyon water with serious trail and safety demands.
Hetch Hetchy watershed context
Use NPS rules around reservoir and downstream restrictions.
NPS Yosemite fishing rules and Tuolumne/Hetch Hetchy access information should drive the trip before fly choice or mileage goals.
Confirm parking, land ownership, launch status, and current agency notices before relying on any access point.
Cold snowmelt, granite falls, remote trails, high elevation weather, and limited exits
River sources
Official Tuolumne River 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
Reviewed byBlueStreamFly River Review Team
Trip guidance checked
What was checked: This report uses official regulation, flow, weather, access, and public-source material first, then adds practical angler planning guidance without replacing current rules.
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.
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.
More helpful links
Use these links for stocking, safety, and other local details.
See all 8 checked sources
Rules and closures
Check what is allowed, where the rule applies, and whether the river is open.
What this source covers
Open the current rules and check the river section, season, and special limits.
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.
What this source covers
Open this page and check the latest safety advice before your trip.
What this source covers
Open this river reading to check the latest level, flow, and update time.
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.
What this source covers
Open the land or access page, then check signs before you park or enter.
What this source covers
Open the land or access page, then check signs before you park or enter.
More helpful links
Use these links for stocking, safety, and other local details.
What this source covers
Open this page for more river information and check when it was last updated.
Quick answers
Quick Tuolumne River answers.
Is Tuolumne River usually open for fly fishing?
Check current CDFW rules and land-management notices first. This page gives planning context, but legal status comes from current rules.
Should I wade or float?
Wade-and-move is the baseline. Float only where you have whitewater skill, legal access, and a safe takeout.
Which flow source should I use?
Use the RiverReports chart for a fast read and USGS 11274790 as the official flow source or context source.