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Fly fishing report · West
Madison River In Yellowstone Park
A Yellowstone Park Madison report that puts permits, fly-only rules, native-fish handling, thermal water, and current flow checks ahead of generic hatch copy.
Check flow & weatherToday's fishing decisionMost live data available
39
Skip today
Do not commit until the safety issue clears.
Water temperature above salmonid stress threshold
Best supported approachNo approach recommended
Watch nextWater temperature above salmonid stress threshold
Updated Aug 3, 1:00 AM UTCUsually refreshes about every 45 minutes
Water temperature above salmonid stress threshold
Safety overrides tacticsNo approach recommended
The active safety or closure reason takes priority over wading, bank fishing, and floating guidance.
Check before you drive
Current flow and weather.
Look at whether the river is rising or falling, then check wind, rain, and storms. These can change both safety and fishing.
Loading current flow and weather.
Before you rely on this report
How current is this report?
Conditions can change quickly. Check these dates before you decide to fish, and open the official source when safety or rules matter.
- River conditions
- Checked Aug 2, 2026, 9:00 PM
- Fishing guidance
- Reviewed Jul 6, 2026
- Public access
- No reviewed map pin available
- Rules and closures
- Official rule links checked
High confidence in the current score inputs.
7 sources are listed below for you to open.
3 public access records are listed. Private spots are never shown.
Source checked Jul 30, 2026
Plan your access
Know where you can enter.
These are public parking, launch, trail, or recreation areas—not secret fishing spots. We never show an angler's private pins, notes, or photos here.
- 0
- Shown on map
- 3
- No map pin
Location checkedDescription only
01No map pin
Area description
Madison Junction
Key orientation point where the Madison forms from the Firehole and Gibbon.
Restrictions and seasonal notes
Fishing from road bridges is restricted in Yellowstone.
Thermal ground and wildlife are real safety issues, not scenery notes.
02No map pin
Roadside access
West Entrance corridor
Roadside access with traffic, wildlife, and regulation checks.
Restrictions and seasonal notes
Fishing from road bridges is restricted in Yellowstone.
Thermal ground and wildlife are real safety issues, not scenery notes.
03No map pin
Area description
Park boundary context
Use the USGS West Yellowstone gauge for nearby flow and temperature context.
Restrictions and seasonal notes
Fishing from road bridges is restricted in Yellowstone.
Thermal ground and wildlife are real safety issues, not scenery notes.
How to fish it
Start with Yellowstone rules before choosing flies.
The Madison inside Yellowstone is a highly regulated park fishery. A useful plan checks the permit, open reach, bridge restrictions, fly-only rules, native-fish handling, thermal water, and road conditions before discussing hatches.
- A Yellowstone fishing permit is required for anglers 16 and older; state licenses do not replace it.
- The Madison has fly-fishing-only and barbless/lead-free style guardrails in the park regulations.
- Use the West Yellowstone USGS gauge for flow and temperature context near the park boundary.
- Watch warm-water stress and temporary closures during hot or low-flow periods.
Why the score looks this way
Water temperatureLowers score
USGS water temperature is about 75F. Do not pressure trout or salmonids in warm water.
FlowUse caution
USGS shows 303 cfs with a stable over about 6 hours trend. Today's flow is unusually low for this date and below the usual low-water marker near 334 cfs. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
SeasonHelps score
Summer: Good hatches and terrestrials, but warm water and crowds require discipline.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
Skip the Madison in the park when the reach is not open, the permit or fly-only rules are unclear, water temperatures threaten trout recovery, thermal ground or wildlife makes access unsafe, or road conditions make the chosen pullout impractical.
Read the water
What changes the plan.
Best windows are cool mornings, stable flows, and legal open reaches with safe water temperatures. Hot afternoons, road closures, or unclear regulation boundaries should push you to a different plan.
Cool stable flow
Best all-around window for dry-dropper fishing and careful nymphing.
Thermal warmth
Fish early, check temperature, and stop before trout handling becomes stressful.
High spring water
Use heavier nymphs on soft edges only where the reach is open and safe.
Low clear water
Lengthen leaders, use small flies, and avoid repeated casts over visible fish.
Your trip plan
Know when to go—and when to skip it.
Best flows
Use USGS 06037500 near West Yellowstone as the best live trend near the park boundary. Stable flows with cool water are the best fit; warm water, thermal influence, storm runoff, or temporary closures should shorten or cancel the plan.
When to skip
Skip the Madison in the park when the reach is not open, the permit or fly-only rules are unclear, water temperatures threaten trout recovery, thermal ground or wildlife makes access unsafe, or road conditions make the chosen pullout impractical.
Local plan
Start with the park rule page and regulation PDF, then choose the corridor: Madison Junction for formation context, meadow and roadside water toward the West Entrance for the main plan, or the boundary gauge for flow and temperature context.
Backup water
If the Madison is warm, crowded, closed, or unsafe, compare the Yellowstone River in the park for another permit-first page, the Madison at West Yellowstone for boundary flow context, or the Snake River for a different park-adjacent cutthroat plan.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
Late May to JuneCold-water midges, BWOs, caddis, and early stoneflies when park water is openZebra midge, BWO emerger, caddis pupa, golden stone nymph, soft hackle
Fly pattern · report suggests “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 ↗
Fly family · report suggests “BWO emerger”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 JulyPMDs, caddis, golden stones, Green Drakes in suitable water, and spinner fallsPMD emerger, X-caddis, golden stone dry, green drake, rusty spinner
Fly family · report suggests “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 ↗
Fly pattern · report suggests “X-caddis”X-CaddisIdentify the X-Caddis by the combination of a sparse translucent Zelon-style trailing shuck, slim dubbed body, tented deer- or elk-hair wing, small clipped head, and no palmered body hackle. The separately photographed Elk Hair Caddis has a higher, hackled adult footprint and no defining trailing shuck. The natural-adult photograph explains the caddis tent-wing silhouette, but it does not turn the X-Caddis into an exact adult-species imitation.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box August to SeptemberTerrestrials, ants, beetles, hoppers, small caddis, and evening spinnersFoam ant, beetle, hopper, small caddis, parachute Adams, sparkle dun
Fly family · report suggests “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 ↗
Fly family · report suggests “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 ↗+ 4 more reviewed guides in the Fly Box OctoberBWOs, midges, streamers where legal, and short cold-weather feeding windowsBWO emerger, midge pupa, small soft hackle, sculpin, olive bugger
Fly family · report suggests “BWO emerger”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 ↗
Fly family · report suggests “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 ↗+ 3 more reviewed guides in the Fly Box 01
Read the current NPS regulation section for the exact reach before rigging.
02
Use dry-droppers in broken water and single dries during visible surface feeding.
03
Nymph deeper seams with small, clean rigs instead of over-weighting shallow meadow water.
04
Avoid fishing through warm afternoon temperatures when the river is stressed.
05
Stay on approved paths in thermal areas and keep wildlife distance even when fish are rising.
Rules & closures
Check the official rules before you go.
Open the agency page to confirm the exact river section, species, season, tackle rules, limits, and emergency closures.
Official links checkedRules for this river or sectionNo special rule found
We did not find a special rule for this river.
We checked the state source but did not find a clearly supported exception for this river. Check the official rules for the exact section you plan to fish.
Rules checkedJul 30, 2026
Report a correction ↗Always follow the official rule
This summary helps with trip planning. The linked agency rule is the one you must follow.
Updates from anglers
What anglers are seeing.
Recent observations from general areas of Madison River In Yellowstone Park. We review every update before it appears and never publish exact fishing spots, private access details, or photo locations.
Angler updates are not loading right now.
You can still use the river plan above. Check back later for recent observations from other anglers.
Where this report comes from
Open the sources we checked.
Fishing guidance checked: Jul 6, 2026
Site check: Jul 14, 2026. We regularly test report links, live scores, flow and weather data, and page loading. The content date changes only when the fishing guidance or its sources change.
regulationYellowstone National Park fishingregulationYellowstone 2026 fishing regulations PDFsafetyYellowstone current conditionsflowUSGS Madison River near West Yellowstone 06037500safetyNational Weather Service Madison River forecast pointbackgroundNPS Yellowstone fish ecologyaccessNPS Yellowstone fishing access and rules
Common questions
Before you leave.
What should I check before fishing Madison River In Yellowstone Park?+
Yellowstone fishing permit, 2026 park rules, road status, warm-water closures, USGS flow, and weather
Which flow should I use for Madison River In Yellowstone Park?+
Use USGS 06037500 near West Yellowstone for flow and temperature context, then check park closures and reach rules before fishing.
Where should I start on Madison River In Yellowstone Park?+
Start with Madison Junction and the West Entrance corridor, but only after confirming the open reach, permit, road status, and bridge restrictions.
Can I wade Madison River In Yellowstone Park?+
Yes in some meadow and roadside reaches at safe flows, but thermal ground, wildlife, and slippery channels make cautious wading essential.