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This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
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Fly fishing report · Southwest
San Juan River
A below-Navajo-Dam San Juan report for Quality Water trout, technical midge fishing, release checks, access, regulations, and trip planning.
Check flow & weatherToday's river scoreLive calculation
71
Good
Best option: Bank / edge.
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Returned dataHigh reliabilityReliability of the flow, weather, and alert data that returned.
Today's decisionHigh confidenceCurrent flow, weather, alerts, and trip-critical signals support this decision.
Score calculated Aug 10, 12:30 PM UTCUsually refreshes about every 45 minutes
Recommended approachBank / edge
Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.
Bank / edge · Best fit71/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Float71/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Confirm before you leave
Flow and weather right now.
Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.
Loading current flow and weather.
River strategy
Expect technical tailwater fishing, not easy trout.
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.
- Use the Archuleta gauge and release context before choosing a wade or boat plan.
- Quality Water rules and tackle limits matter, so check the current New Mexico rule book.
- Start with midges and BWOs, then adjust to fish behavior and water clarity.
- Crowds are part of the fishery; have a section, timing, and etiquette plan before arriving.
Why this score moved
FlowUse caution
USGS shows 908 cfs with a stable over about 6 hours trend. same-date USGS history (1963-2023, 61 readings) puts normal around 666 cfs and the upper quartile near 871 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.
SeasonHelps score
Summer: Cold releases keep trout options open, but crowds and weeds can matter.
Water temperatureHelps score
USGS water temperature is about 45F, with no heat stop triggered.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
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.
Read the water
What changes the plan.
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.
Field plan
Fish it with intention.
Best flows
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.
When to skip
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.
Local plan
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.
Backup water
If the San Juan is crowded, weedy, or release-complicated, compare the Chama, Pecos, or Cimarron reports before forcing a technical tailwater day.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
March to AprilMidges, BWOs, early caddis, and small stonefliesZebra midge, RS2, BWO emerger, caddis pupa, small black stonefly
Reviewed pattern · report says “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗
Reviewed pattern · report says “RS2”RS2Start with the beadless architecture: two dark-dun Microfibett tails separated behind a slim, tightly twisted and visibly segmented dubbed abdomen; a fuller thorax; and saddle-hackle web clipped into a short angled wing bud. Rim Chung's original-style form uses natural beaver dubbing and hackle web. CDC- or Antron-wing ties, beads, curved hooks, flash, and tailless Avatar-style flies must remain labeled variations.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box May to JuneCaddis, PMDs, yellow sallies, golden stones, and runoff-edge bugsElk hair caddis, PMD emerger, yellow sally, Pat's rubber legs, hare's ear
Reviewed pattern · report says “Elk hair caddis”Elk Hair CaddisLook for a tented elk- or deer-hair wing, clipped hair head, dubbed body, rib, and hackle palmered along the body. The body color should be labeled because tiers often match different natural caddis colors.See photos & how to fish it ↗
Reviewed family · report says “PMD emerger”Pale Morning Dun PatternsPMD names an insect group, not one fly. Pale nymphs, trailing-shuck emergers, upright or low-riding duns, cripples, and spent-wing spinners stay visibly separate.See family guide ↗+ 3 more reviewed guides in the Fly Box July to SeptemberTerrestrials, caddis, tricos, midges, and small mayfliesFoam ant, beetle, hopper-dropper, trico spinner, parachute Adams
Reviewed family · report says “Foam ant”Ant PatternsAnt patterns can be foam, fur-bodied, winged, or sunken. The narrow waist and paired body lobes matter more than one material recipe.See family guide ↗
Reviewed family · report says “beetle”Beetle PatternsBeetle flies range from simple foam shells to hair-bodied and sunken forms. A rounded back and compact profile distinguish the family from ants and hoppers.See family guide ↗+ 2 more reviewed guides in the Fly Box October to winterMidges, BWOs, eggs where legal, leeches, and low-light streamer windowsMidge pupa, BWO, egg pattern where legal, leech, small sculpin
Reviewed family · report says “Midge pupa”Midge Patterns by StageMidge wording can mean a threadlike larva, wing-padded pupa, film emerger, tiny adult, or visible cluster. Those profiles fish at different depths.See family guide ↗
Reviewed family · report says “BWO”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗+ 3 more reviewed guides in the Fly Box 01
Start with a two-fly midge or BWO rig when rules allow, then adjust depth before changing patterns.
02
Use small indicators, long drifts, and careful mends through slow slicks and flats.
03
Fish streamers or leeches in low light, on edges, or when releases add movement.
04
Watch other anglers' spacing and avoid stepping into active feeding lanes.
05
Carry a thermometer and landing net even though the tailwater is cold; quick handling still matters.
Access & responsibility
Know the entry. Know the exit.
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-regulation 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.
Recent reach reports
What anglers are seeing.
Moderated, river-level updates for San Juan River. Exact spots, private access notes, and private media never appear here.
No verified reach reports yet.
Be the first to share a generalized river update through the moderated BSF app flow.
Transparent sources
Check the facts behind the plan.
Editorial guidance reviewed . This date applies to access, hatches, tactics, and source notes—not today's conditions.
Active maintenance check: . BlueStreamFly checks report sources, links, live fishability inputs, and page rendering on a recurring maintenance schedule. This check does not change the material review date unless public guidance or sources changed.
These links answer different trip questions. A reviewed source is a place to verify the decision; it is not a promise that the river, access, or season is open. Source review dates are separate from today's live fishing score.
Source coverage: Flow — verify before leaving; Weather — reviewed source; Public access — reviewed source; Fishing rules — reviewed source; Emergency notices — no verified source yet; Conservation contact — source status unknown.
Fishing rulesNew Mexico 2026-2027 Fishing Rules and Information
New Mexico Department of Game and Fish · Supports fishing rules
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: The official rule text controls; this directory does not infer legal methods, seasons, species rules, or open status. This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Fishing rulesNew Mexico Department of Game and Fish fishing regulations
New Mexico Department of Game and Fish · Supports fishing rules
Reviewed in this Sourcebook release · Checked · Review window through · Statewide source: New Mexico
Limit: Fire, forest, tribal, and land-manager closures can be separate from state fishing rules and must be verified for the planned access. Official regulations remain the legal authority; this directory does not summarize or certify the rules for a reach.Opens the official source in a new tab.Flow gaugeSAN JUAN RIVER NEAR ARCHULETA, NM
United States Geological Survey Water Data · Supports flow conditions
Verify with the authority · Checked · Report reach: San Juan River report reach
Limit: The configured station 09355500 is the single USGS station ID documented by the report's official flow sources. The official station is available, but BlueStreamFly has not recorded a documented reach-level mapping review.Opens the official source in a new tab.Public accessNavajo Lake State Park
Reviewed source — emnrd.nm.gov · Supports public access
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Public accessNMDGF San Juan Fishing Easement WMA map
New Mexico Department of Game and Fish · Supports public access
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Weather forecastNWS forecast for San Juan River below Navajo Dam
National Weather Service · Supports weather forecast
Reviewed in this Sourcebook release · Checked · Review window through · Reviewed point: San Juan River below Navajo Dam
Limit: Approximate forecast point only. It is not an access coordinate, river gauge, measured rainfall record, or fishing location.
Forecast-only point — not public access 36.8080, -107.6700 · BlueStreamFly-reviewed coordinates checked · Reviewed by BlueStreamFly Editorial Team · Coordinate source bluestreamfly.com
Coordinate limit: Canonical report forecast point; never use or display this coordinate as public access.Opens the official source in a new tab.
New Mexico Department of Game and Fish · Supports fishing rules
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: The official rule text controls; this directory does not infer legal methods, seasons, species rules, or open status. This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Fishing rulesNew Mexico Department of Game and Fish fishing regulations
New Mexico Department of Game and Fish · Supports fishing rules
Reviewed in this Sourcebook release · Checked · Review window through · Statewide source: New Mexico
Limit: Fire, forest, tribal, and land-manager closures can be separate from state fishing rules and must be verified for the planned access. Official regulations remain the legal authority; this directory does not summarize or certify the rules for a reach.Opens the official source in a new tab.Flow gaugeSAN JUAN RIVER NEAR ARCHULETA, NM
United States Geological Survey Water Data · Supports flow conditions
Verify with the authority · Checked · Report reach: San Juan River report reach
Limit: The configured station 09355500 is the single USGS station ID documented by the report's official flow sources. The official station is available, but BlueStreamFly has not recorded a documented reach-level mapping review.Opens the official source in a new tab.Public accessNavajo Lake State Park
Reviewed source — emnrd.nm.gov · Supports public access
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Public accessNMDGF San Juan Fishing Easement WMA map
New Mexico Department of Game and Fish · Supports public access
Reviewed in this Sourcebook release · Checked · Review window through · Report reach: San Juan River report reach
Limit: This link was reviewed with the canonical report. Recheck the source, posted signs, affected reach, and effective date before relying on it.Opens the official source in a new tab.Weather forecastNWS forecast for San Juan River below Navajo Dam
National Weather Service · Supports weather forecast
Reviewed in this Sourcebook release · Checked · Review window through · Reviewed point: San Juan River below Navajo Dam
Limit: Approximate forecast point only. It is not an access coordinate, river gauge, measured rainfall record, or fishing location.
Forecast-only point — not public access 36.8080, -107.6700 · BlueStreamFly-reviewed coordinates checked · Reviewed by BlueStreamFly Editorial Team · Coordinate source bluestreamfly.com
Coordinate limit: Canonical report forecast point; never use or display this coordinate as public access.Opens the official source in a new tab.
Other report references: These support editorial context but are not presented as reviewed official authorities in the Sourcebook.
flowRiverReports San Juan River near ArchuletaOpens this reference in a new tab.regulationNew Mexico general fishing regulationsOpens this reference in a new tab.backgroundNMDGF fisheries management: San Juan RiverOpens this reference in a new tab.
See this river in the Official River Sourcebook
Something changed? Report a source or reach correction. Send public-source corrections only. Do not submit private access notes, exact private spots, pins, marker IDs, user IDs, photo locations, or private media.
Common questions
Before you leave.
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 regulations 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.