Wade · Best fit62/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
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Fly fishing report · Rockies
Lamar River
A Lamar River report built from current Yellowstone regulations, the northeast-region rule set, Tower-area access, and native-fish conservation first.
Check flow & weatherToday's fishing decisionMost live data available
62
Use caution
Lamar River is a cautious call right now.
Current USGS flow is 271 cfs and has been stable for about 6 hours. Today's flow is below the normal seasonal range, which begins near 336 cfs. This is below normal, so edge depth, temperature, and pressure matter.
Best supported approachWade
Watch nextFlow: Current USGS flow is 271 cfs and has been stable for about 6 hours. Today's flow is below the normal seasonal range, which begins near 336 cfs.
Updated Aug 3, 1:18 AM UTCUsually refreshes about every 45 minutes
Best supported approachWade
Compare wading, bank fishing, and floating before choosing how you will fish.
Bank / edge62/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
FloatNeed data
This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
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, 9:18 PM
- Fishing guidance
- Reviewed Jun 2, 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
Tower-area river corridor
The cleanest official access and permit anchor on the west side of the valley.
Restrictions and seasonal notes
Use the Tower Backcountry Office as your official information and permit anchor for this part of the park.
Give wildlife more room than you think you need; the valley belongs to bison and bears before it belongs to anglers.
02No map pin
Roadside access
Roadside Lamar Valley pullouts
Useful for scouting banks and wildlife before you commit to a walk.
Restrictions and seasonal notes
Use the Tower Backcountry Office as your official information and permit anchor for this part of the park.
Give wildlife more room than you think you need; the valley belongs to bison and bears before it belongs to anglers.
03No map pin
Area description
Meadow-bank walking stretches
Best when weather is stable and you already know where the safe exit is.
Restrictions and seasonal notes
Use the Tower Backcountry Office as your official information and permit anchor for this part of the park.
Give wildlife more room than you think you need; the valley belongs to bison and bears before it belongs to anglers.
How to fish it
The Lamar is worth everything when the park window is open and the valley is fishable, but it is still a Yellowstone conservation river before it is your best-photo day.
This is one of the signature meadow rivers in Yellowstone, but the rules and the wildlife are part of the river, not side notes. Keep RiverReports open for trend context, confirm with USGS 06188000, and build the day around current park regulations, open reaches, and what the valley is telling you in real time.
- Yellowstone’s northeast-region rules say native fish are catch-and-release, while rainbow trout, brook trout, and identifiable cutthroat-rainbow hybrids in the Lamar drainage must be killed.
- The Tower Backcountry Office is the cleanest official access and permit anchor in this part of the park.
- The Lamar Valley page reminds you this is also major wildlife country, not just a fly-fishing backdrop.
- Wind and afternoon storms can turn a perfect-looking meadow session into a short one fast.
Why the score looks this way
FlowUse caution
USGS shows 271 cfs with a stable over about 6 hours trend. Today's flow is below the normal seasonal range, which begins near 336 cfs. This is below normal, so edge depth, temperature, and pressure matter.
Water temperatureUse caution
USGS water temperature is about 67F. Fish early and stop if handling stress is likely.
Best mode nowUse caution
Wade: Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
SeasonHelps score
Summer: The signature Lamar window for meadow dries, nymphs, and long sight-fishing walks.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Read the water
What changes the plan.
The Lamar is best when runoff has dropped into defined banks, the open reach aligns with current park rules, and afternoon thunderstorms or wildlife congestion are manageable. Skip it when the river is high and dirty, when the valley is stormed out, or when park advisories say back off.
Clear dropping runoff
The most exciting all-around Lamar condition because banks, seams, and sight-fishing lanes all improve together.
Windy meadow flow
Still fishable, but presentations and fish handling become much harder than the river map suggests.
High dirty water
Usually a pass unless you are only scouting the valley for a later day.
Low late-season flow
Can still fish beautifully, but fish handling and trout stress need more attention.
Your trip plan
Know when to go—and when to skip it.
Best flows
Best on clear dropping runoff or moderate summer flows that still let you see banks, seams, and fish movement.
When to skip
Skip when high dirty water, thunderstorms, wildlife congestion, or park advisories make the day unsafe or low value.
Local plan
Check the Tower office and current rules first, scout the gauge trend, then commit to one valley section and fish it with conservation first.
Backup water
Move to another open Yellowstone river if Lamar-specific rules, wildlife, or weather make the valley a poor choice.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
Late May to JuneCold-water midges, BWOs, caddis, and early stoneflies once park water opensZebra 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, 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, and short cold-weather feeding windowsBWO emerger, midge pupa, small soft hackle, olive bugger, sculpin
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
Walk enough to leave the first roadside pullout crowd, but not so far that wildlife or weather trap you out in the valley.
02
Use dries whenever the fish are willing because the Lamar rewards clean visual fishing better than forced dredging on good days.
03
On windy afternoons, shorten drifts and fish the soft edges that still let you land and release fish quickly.
04
If you catch a nonnative fish in the Lamar drainage, follow the current park kill requirement instead of defaulting to outside habits.
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 Lamar River. 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: Jun 2, 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 northeast fishing regulationsaccessTower Backcountry OfficebackgroundLamar River watershed overviewsafetyYellowstone current conditionsflowUSGS 06188000 Lamar River near Tower Ranger StationsafetyNational Weather Service point near Lamar Valley
Common questions
Before you leave.
What is the biggest Lamar River rule I need to remember?+
In the Lamar drainage, native fish are catch-and-release, while rainbow trout, brook trout, and identifiable cutthroat-rainbow hybrids must be killed under current Yellowstone rules.
Where should I start on the Lamar River?+
Start with the Tower-area information and pullouts, check the current park rules and gauge, then choose a meadow walk only after wildlife and weather both look manageable.
When should I skip the Lamar River?+
Skip when runoff is still dirty, when thunderstorms or wildlife make the valley unsafe, or when park advisories say the reach is not a good call.