WadeNot recommended
This report does not recommend wading on this reach.
All New Mexico reports
Fly fishing report · Southwest
San Juan River
Is San Juan River worth the trip today? Check flow, weather, hatches, access, and rules for New Mexico before you go.
See the flow chart ↓Photo: Ken Lund from Reno, Nevada, USA Opens in a new tab. · CC BY-SA 2.0
Good day to fish?Latest river check
Caution
Maybe. Read the cautions first.
61
No clear best access mode. Bank / edge and Float have the same top score. Use current access, footing, weather, and local rules to choose.
See update time and confidence
Live data checkHighHow much of the live flow, weather, and alert data came back.
Today's callHighCurrent flow, weather, alerts, and trip-critical signals support this decision.
Score calculated Aug 22, 2026, 10:54 PM MDTUsually checks again about every 45 minutes
Access choicesNo clear best mode
Bank / edge and Float have the same top score. Use current access, footing, weather, and local rules to choose.
Bank / edge61/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Float61/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Your plan
Today's San Juan River plan.
The San Juan below Navajo Dam is one of New Mexico's best-known trout tailwaters. It rewards flow checks, small flies, long drifts, and careful handling more than blind casting.
- Check first
- Use the Archuleta gauge and release context before choosing a wade or boat plan.
- Try
- Start with a two-fly midge or BWO rig when rules allow, then adjust depth before changing patterns.
- Leave when
- Skip exposed wading when releases rise, weeds make footing and drifts poor, winter weather adds ice risk, or the Quality Water rule and access boundary are not clear.
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
- 994 cfs
- From the latest stored river check. Open the official source for the newest reading.Water 49.3°F · 24h high 52.9°F · USGS provisional
- Air now
- 74°F
Current NWS forecast period
- Next 24h high
- 91.0°F
NWS air forecast near
- Rain chance
- 18%
For this forecast period
Latest stored weather check
Isolated Showers And Thunderstorms
Isolated Showers And Thunderstorms
- Wind
- 10 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
San Juan River below Navajo Dam
The National Weather Service forecast is temporarily unavailable.
Live data
Where these readings come from
RiverReports gauge: San Juan River near Archuleta
Water 49.3°F · provisional · 24h high 52.9°F provisionalWater observed · high observed
How to fish it
How to fish San Juan River today.
The San Juan can fish year-round because Navajo Dam releases cold water, but flows, pressure, weeds, and weather decide the best tactic. Slow down, fish lighter, and change depth before changing every fly in the box.
Stable release
Fish long midge or BWO drifts, adjust depth, and work feeding lanes patiently.
Higher release
Use heavier rigs, protected edges, and avoid unsafe crossings.
Low clear water
Use smaller flies, lighter tippet, and longer leaders with clean presentations.
Weedy water
Clean flies often and fish lanes where rigs can drift without fouling.
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.
- Technical fishing
- Technical fishing means the fish are hard to fool, so careful casts and natural drifts matter.
- 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.
- 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.
- Indicator
- An indicator is a small floating marker that can show when a fish takes an underwater fly.
Why this call
Why this score
FlowUse caution
USGS shows 994 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1963-2023, 61 readings) show a median near 759 cfs and the upper quartile near 954 cfs; today's flow is high for the date. Fishable water may exist, but do not rate it highly without a safe access, clarity, and wading or boat plan.
Short-term weatherUse caution
The forecast has storm or heavy-precipitation risk, so timing and access matter more than the score alone.
Best mode nowUse caution
Bank / edge: Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
SeasonHelps
Summer: Cold releases keep trout options open, but crowds and weeds can matter.
Water temperatureHelps
USGS water temperature is about 49.3F, and the rolling 24-hour high did not trigger a heat caution. USGS marks the temperature data provisional and may revise it.
Trip notes
Trip notes
Check these before you choose a reach.
Use RiverReports Archuleta and USGS 09355500 as the primary release trend, then compare current Navajo Dam and state-park context before choosing a wade depth or boat day.
Skip exposed wading when releases rise, weeds make footing and drifts poor, winter weather adds ice risk, or the Quality Water rule and access boundary are not clear.
Start with the Archuleta gauge, NMDGF rules, and Navajo Lake State Park notices. Pick one access area, rig small midge/BWO options, and carry a backup plan for crowds.
If the San Juan is crowded, weedy, or release-complicated, compare the Chama, Pecos, or Cimarron reports before forcing a technical tailwater day.
What to try
San Juan 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
March to April
What to look forMidges, BWOs, early caddis, and small stoneflies
May to June
What to look forCaddis, PMDs, yellow sallies, golden stones, and runoff-edge bugs
July to SeptemberCurrent
What to look forTerrestrials, caddis, tricos, midges, and small mayflies
Flies to try
Also try hopper-dropper
October to winter
What to look forMidges, BWOs, eggs where legal, leeches, and low-light streamer windows
Each fly name opens its matching Fly Box guide.
Access and safety
San Juan River access and rules.
Use these places as starting points. Open the access link below and check posted signs before you park or enter. New Mexico lists the San Juan below Navajo Dam as Special Trout Water with Quality Water rules and tackle limits. Check the current NMDGF rule book and state park notices before fishing.
Navajo Dam and Quality Water
Primary special fishing rule tailwater focus for this report.
Texas Hole and Flats context
Well-known tailwater areas where crowds, drift quality, and etiquette matter.
Crusher Hole and lower access
Use current state park and NMDGF information before choosing a lower reach.
Navajo Lake State Park manages key river access, day-use areas, camping, and visitor logistics.
Do not assume every bank or trail is open in the same way. Check current state park notices.
Cold tailwater and slick vegetation can make simple wades risky, especially in winter.
River sources
Official San Juan 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 is maintained from current regulation, access, flow, weather, and public planning sources so anglers can make better trip decisions than a raw gauge or generic overview would allow.
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 San Juan River answers.
What should I check first before fishing the San Juan River?
Check the Navajo Dam release, Archuleta gauge, Quality Water rules, state park notices, and the NWS forecast.
Are there special fishing rules on the San Juan River?
Yes. The Quality Water and Special Trout Water rules are central to fishing this river legally.
What flies should I bring for the San Juan River?
Bring the hatch-chart flies, a small nymph box, and a few streamers. Then adjust for water temperature, clarity, pressure, and the insects or baitfish you actually see.
Can I wade the San Juan River?
Yes in many tailwater areas, but releases, weeds, and cold water make conservative wading important.
When should I skip the San Juan River?
Skip it when flows are unsafe, water is too warm for trout, emergency closures are active, or legal access for the reach is not clear.