California / West
Tuolumne River
Tuolumne River planning with RiverReports flow, official agency sources, NWS weather, access notes, hatch timing, fly picks, and practical safety guidance.
Image: Generated regional planning image for Tuolumne River / BlueStreamFly generated; not exact location / BlueStreamFlyFishability now: Tuolumne River fishability today
GoodData confidence: High80/100
Fishable now because the live gauge is rising, weather is usable, and no public alert is active.
Flow observed
5:45 PM UTC
Weather observed
5:00 PM UTC
Score calculated
6:14 PM UTC
Why this rating
Flow
Water temperature
Public alerts
Next 6-12 hours
Watch
Recheck within the next few hours; rising water or active weather can change clarity and wading quickly.
USGS flow
1,230 cfs
Current trend: flow rising, rating can drop quickly if clarity or wading safety deteriorates.
More planning details: flies, flow bands, and live source checks
Fish it today
Start here
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.
Best flow clue
Stable, clear, cool water with safe crossings and enough depth to hold trout in pockets.
Skip trigger
Skip during sharp rises, hot low water, unsafe crossings, or road and trail uncertainty.
Flow decision bands
Low but fishable
Low clear water can fish in pocket and meadow edges only when temperatures are safe and park or canyon access is open.
Best high-Sierra window
Stable or slowly falling above-Hetch-Hetchy flow after runoff, mild weather, and open roads create the strongest trout signal.
Runoff or storm unsafe
Snowmelt surges, thunderstorm pulses, or high canyon water should stop crossings and long hikes.
Park and trail caution
Yosemite rules, road status, and trail exits are as important as the gauge.
USGS flow
1,230 cfs
Current trend: flow rising, rating can drop quickly if clarity or wading safety deteriorates.
Live USGS flow
1,230 cfs / rising about 28%
Live NWS forecast
77F / Mostly Sunny
Live water temperature
54F from USGS
No NWS alert flag
No active NWS alert was returned for this forecast point.
Use RiverReports for a quick chart and USGS 11274790 for official flow context.
Yosemite fishing rules, road and trail status, USGS flow, and water temperature
NPS Yosemite fishing rules and Tuolumne/Hetch Hetchy access information should drive the trip before fly choice or mileage goals.
Cold snowmelt, granite falls, remote trails, high elevation weather, and limited exits
Editorial review
How this report is maintained
This report uses official regulation, flow, weather, access, and public-source material first, then adds practical angler planning guidance without replacing current rules.
Byline
BlueStreamFly editorial desk
Reviewed by
BlueStreamFly source review
Maintained by
BlueStreamFly
Last material review
2026-05-31
Report confidence
Good confidence
87/100
Good confidence: RiverReports, USGS above-Hetch-Hetchy flow, Yosemite fishing and Hetch Hetchy sources, BLM Tuolumne Wild and Scenic context, CDFW information, and weather data support the page. Confidence is moderated by broad Yosemite-to-canyon scope, seasonal access, runoff, and sensitive park rules.
Regulations
Yosemite fishing information and CDFW inland guidance provide a strong rule-check path.
Access
Yosemite Hetch Hetchy and BLM Wild and Scenic sources support access planning, with road, trail, and restricted-area checks still required.
Flow and weather
RiverReports, USGS 11274790, and the National Weather Service point are attached to the route.
Fishing usefulness
The page now separates high-country trout planning, snowmelt risk, road and trail access, park rules, canyon safety, and backup-water decisions.
Fishability dashboard and source review
2026-05-31 / material content or source review
RiverReports and USGS Tuolumne River above Hetch Hetchy flow data, Yosemite fishing and Hetch Hetchy information, BLM Tuolumne Wild and Scenic River context, CDFW inland fishing information, and the National Weather Service point were checked before updating the current fishability guidance.
2026-05-31
Updated Tuolumne River with high-Sierra flow guidance, Yosemite and canyon access cards, runoff and road cautions, backup cues, stable fishability SEO, and confidence signals.
2026-05-29
Added a page-specific report-confidence meter for upper Tuolumne flow, Yosemite and BLM access context, regulation checks, high-country weather, and reach-selection guidance.
2026-05-25
Published a new fishing report with flow, weather, hatch, fly, tactics, access, regulation, source, image-credit, and trip-planning sections.
Angler planning edge
Local details that change the plan
Best for
Sierra trout trips, Dry-dropper pocket water, Anglers who can hike and move carefully
Wade or float
Wade-and-move is the baseline. Float only where you have whitewater skill, legal access, and a safe takeout.
Best flows
Stable, clear, cool water with safe crossings and enough depth to hold trout in pockets.
When to skip
Skip during sharp rises, hot low water, unsafe crossings, or road and trail uncertainty.
Local plan
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.
Pressure
Pressure concentrates near easy road pullouts, campgrounds, trailheads, and obvious pools.
Access nuance
NPS Yosemite fishing rules and Tuolumne/Hetch Hetchy access information should drive the trip before fly choice or mileage goals.
Backup water
Check nearby BlueStreamFly reports if the gauge, rules, or weather do not fit the plan.
About the river
Setting, character, and why it fishes the way it does.
Tuolumne River is a high Sierra river that begins in Yosemite country, moves through meadow and canyon water, and requires park-rule and access checks.
The best plan is built around safe flow, legal access, water temperature, and short realistic reaches instead of trying to cover the whole drainage.
NPS Yosemite fishing rules and Tuolumne/Hetch Hetchy access information should drive the trip before fly choice or mileage goals.
Target species
Rainbow trout
Primary high-country fly target where fishing is legal and conditions are safe.
Brook trout
Possible in connected high-country water; follow park and state rules.
Brown trout
Possible in some Sierra reaches and lower-light pockets.
Native aquatic species
Yosemite and Sierra habitats can be sensitive; avoid trampling banks and spawning areas.
Reading the water
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.
Best seasons
Late spring
Fish after snowmelt, release changes, or road conditions settle enough for safe access.
Summer
Best dry-dropper and attractor window, especially early and late before canyon heat builds.
Fall
Cooler nights, lower pressure, and stable water can create the cleanest trout fishing.
Winter
Specialized and access-dependent. Check roads, park or forest notices, and current rules.
Preferred flow source
Tuolumne River above Hetch Hetchy
RiverReports is the preferred chart source when coverage exists. When a matching USGS gauge exists, keep it open as the official backstop for station data and current hydrograph context.
USGS data chart
Official USGS trend
Streamflow over the latest USGS reporting window.
Latest
1,230 cfs
Jun 3, 5 PM UTC
Weather
River weather report
Weather can change wading safety, road access, water temperature, hatches, and the best time of day to fish.
Live forecast loads as you reach this section
This keeps the report fast while still using the official National Weather Service forecast point.
Hatches and flies
Hatch chart and fly picks
Spring
Little stones, BWOs, caddis, and runoff-edge nymph movement
Stonefly nymph, BWO emerger, hare's ear, caddis pupa
Early summer
Caddis, PMDs, yellow sallies, and attractor dry-fly windows
Elk hair caddis, PMD emerger, yellow stimulator, perdigon
Late summer
Terrestrials, ants, beetles, hoppers, and evening caddis
Foam ant, beetle, hopper, X-caddis, parachute Adams
Fall
BWOs, midges, October caddis, and small streamer windows
BWO emerger, zebra midge, October caddis pupa, olive bugger
Dry-dropper flies
Stimulator, chubby, elk hair caddis, ant, beetle, pheasant tail, perdigon
Use in pocket water, riffles, and summer freestone lanes.
Nymphs
Stonefly nymph, hare's ear, caddis pupa, zebra midge, jig nymph
Use when cold water, bright sun, or fast seams keep trout down.
Streamers
Olive bugger, small sculpin, black leech, sparkle minnow
Use near deeper buckets, undercut banks, and slightly colored water.
Tactics
How to fish it
Start with a dry-dropper in broken water before adding weight.
Fish near-bank pockets first; canyon trout often hold closer than expected.
Use small streamers in deeper buckets or slightly colored water.
Move often and avoid wasting the best daylight on unsafe crossings.
Rigging
Rod, leader, and setup notes
A 4- or 5-weight with floating line covers most dry-dropper and nymph work.
Carry 4X to 6X for clear pocket water and stronger tippet for streamers.
Use compact rigs that can be changed quickly on rocky banks.
Pack a thermometer and stop trout fishing when water gets too warm.
Access
Access and planning notes
Upper Tuolumne and Yosemite context
Park rule and road checkWade / float / trail
Park / trail / meadow wade
When to pick it
Use it when Yosemite access, season, and flow all support a short trout plan.
Caution
Park rules and road status can override a good weather window.
Hetch Hetchy planning area
Flow and canyon contextWade / float / trail
Gauge / trail / canyon scout
When to pick it
Start here when the flow trend is falling and the access plan is realistic.
Caution
Canyon exits and restricted zones need current confirmation.
BLM Tuolumne Wild and Scenic corridor
Canyon access frameworkWade / float / trail
Trail / road / bank
When to pick it
Use it when public-land context and weather support a lower-canyon trip.
Caution
Public-land context is not a substitute for trail, closure, and river-crossing checks.
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
Regulations
Check before fishing
Check current CDFW inland trout regulations plus park, forest, or BLM notices before fishing. Rules can vary by reach and season.
Primary base
Tuolumne Meadows, Hetch Hetchy, or Groveland approach
Best day style
Yosemite high-country, trail, and canyon access
Check first
Yosemite fishing rules, road and trail status, USGS flow, and water temperature
Safety
Cold snowmelt, granite falls, remote trails, high elevation weather, and limited exits
Gear
Helpful gear for this water
4- or 5-weight rod
Enough for most trout presentations.
Wading staff
Useful on slick granite, cobble, and fast pocket water.
Thermometer
Protects trout during warm afternoons and low flows.
Layered pack
Canyon weather and exits can change the feel of the day.
Nearby water
Other water to research
Backup logic
High water
Compare Upper Truckee, North Fork Stanislaus, or the Merced after checking road and park status.
Heat
Fish early, seek colder high-elevation water, and stop trout pressure when temperatures become stressful.
Storms or runoff
Wait for the graph to fall and trails to dry before committing to canyon water.
Access issue
Choose an open Yosemite or forest reach with confirmed parking and trail access.
Tuolumne River above Kirkwood Bridge
A more specific Tuolumne reach with separate flow chart.
Tuolumne River below Hetch Hetchy
Downstream Hetch Hetchy planning.
Stanislaus River
A lower valley and park-access contrast.
FAQ
Fast answers
Is Tuolumne River fishable today?
Tuolumne River looks fishable right now. The live score is 80/100, based on current flow, weather, public alerts, and the report's planning context. Recheck the linked gauge and forecast before leaving because conditions can change quickly after rain, heat, access changes, or flow swings.
What flow is best for Tuolumne River?
Stable, clear, cool water with safe crossings and enough depth to hold trout in pockets.
When should I skip Tuolumne River?
Skip during sharp rises, hot low water, unsafe crossings, or road and trail uncertainty.
Is Tuolumne River safe to wade right now?
The fishability score is not a wading guarantee. Wade only where your chosen access has safe edges, clear footing, legal entry, and no forced crossings; high, rising, stained, or storm-affected water should be treated conservatively.
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.
Sources
Source set for this report
Reviewed 2026-05-31