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Fly fishing report · West
Stillwater River
A Stillwater River report for anglers deciding whether the Absarokee-Columbus freestone has safe flows, useful clarity, and enough public access to fish well.
Check flow & weatherToday's fishing decisionMost live data available
7
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, 1:09 AM UTCUsually refreshes about every 45 minutes
Water temperature above salmonid stress threshold
Red Flag Warning issued August 2 at 2:59PM MDT until August 3 at 3:00AM MDT by NWS Billings MT
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, 9:09 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
Absarokee area
The best planning anchor for the USGS gauge and lower Stillwater access decisions.
Restrictions and seasonal notes
The Stillwater has several public access opportunities, but site status matters. Check FWP access details and closure pages before committing to a shuttle.
Montana stream access law still requires lawful entry. Do not cross private land to reach a promising bank.
02No map pin
Area description
Montana FWP fishing access sites
Use the current FWP map and site details because conditions, fees, or repairs can change.
Restrictions and seasonal notes
The Stillwater has several public access opportunities, but site status matters. Check FWP access details and closure pages before committing to a shuttle.
Montana stream access law still requires lawful entry. Do not cross private land to reach a promising bank.
03No map pin
Area description
Columbus lower-river corridor
A downstream option when flows and public access line up for a longer float plan.
Restrictions and seasonal notes
The Stillwater has several public access opportunities, but site status matters. Check FWP access details and closure pages before committing to a shuttle.
Montana stream access law still requires lawful entry. Do not cross private land to reach a promising bank.
How to fish it
Fish the Stillwater when the freestone has dropped into shape, not when runoff or heat tells you to wait.
The Stillwater is a fast, bouldery Yellowstone-tributary trout river that rewards good timing. The best days have enough flow to keep fish comfortable, enough clarity to read seams, and enough caution to avoid treating a pushy freestone like an easy park-and-cast creek.
- RiverReports is used for the quick visual chart, with USGS 06205000 near Absarokee as the official flow reference.
- Montana FWP lists fishing access resources and current regulations that should be checked before using public sites.
- High spring runoff can make the river unsafe to wade and difficult to fish, while hot low water requires trout-safe timing.
- Public access is good by Montana standards, but individual sites can have closures, repairs, fees, or seasonal limits.
Why the score looks this way
Water temperatureLowers score
USGS water temperature is about 71F. Do not pressure trout or salmonids in warm water.
Public alertLowers score
An active alert is in effect: Red Flag Warning issued August 2 at 2:59PM MDT until August 3 at 3:00AM MDT by NWS Billings MT. Check public safety sources before going.
FlowUse caution
USGS shows 742 cfs with a stable over about 6 hours trend. Today's flow is below the normal seasonal range, which begins near 831 cfs. This is below normal, so edge depth, temperature, and pressure matter.
SeasonHelps score
Early summer: Strong after the river drops into shape and before full heat dominates.
Fishing usefulnessHelps score
Skip during heavy runoff, muddy water, dangerous wading, active closures, or hot afternoons that stress trout.
Read the water
What changes the plan.
The Stillwater usually improves after peak runoff when flows remain strong but clearer. Summer mornings, fall streamer days, and post-runoff dry-dropper windows are the main targets. Skip it when the river is too high to wade, too dirty to read, or too warm to handle trout well.
Dropping post-runoff flow
Often the best large-fly and nymph window when clarity returns but the river still has power.
Clear summer flow
Fish early, use dry-dropper rigs, and watch temperature during bright afternoons.
High spring runoff
Usually a safety and clarity problem. Wait for the river to drop and define softer edges.
Cool fall water
Good for streamers, baetis, and nymphing deeper slots with less recreational pressure.
Your trip plan
Know when to go—and when to skip it.
Best flows
Dropping, clearing flows after runoff and moderate summer levels that leave pocket water readable without warming the river too much.
When to skip
Skip during heavy runoff, muddy water, dangerous wading, active closures, or hot afternoons that stress trout.
Local plan
Start with the Absarokee gauge, confirm access-site status, then pick either a short pocket-water wade or a conservative float based on the flow.
Backup water
Shift to the Yellowstone or another lower-elevation option when Stillwater runoff is too high, or to cooler mountain water when summer heat becomes the limiter.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
SpringMidges, BWOs, early stonefliesZebra midge, BWO emerger, stonefly nymph
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 ↗+ 1 more reviewed guide in the Fly Box Post-runoffSalmonflies, golden stones, caddisChubby, pat's rubber legs, elk hair caddis
Fly pattern · report suggests “Chubby”Chubby ChernobylIdentify the construction, not the color: a long foam overbody over a segmented dubbed underside, rubber legs at two tie-in stations, two distinct buoyant synthetic-yarn wing sections, and a short flash tail. The paired wing stations and layered foam-and-dubbing body separate the reviewed Chubby from the original Chernobyl Ant and from generic foam hoppers or beetles.See photos & how to fish it ↗
Fly pattern · report suggests “pat's rubber legs”Pat's Rubber LegsThe core Pat's Rubber Legs architecture is a long weighted stonefly nymph with a chenille body, two rubber tails, a pair of antennae, and multiple long flexible legs. Pat Bennett's documented 1995 form used true-brown chenille and true-olive Super Floss; coffee-and-black became a familiar later guide treatment. Beads, jig hooks, thoraxes, wing cases, articulated bodies, white legs, and other colors are explicit variations—not silent parts of one universal recipe.See photos & how to fish it ↗+ 1 more reviewed guide in the Fly Box SummerCaddis, PMDs, terrestrialsHopper-dropper, PMD cripple, ant, beetle
Fly family · report suggests “PMD cripple”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 family · report suggests “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 ↗+ 1 more reviewed guide in the Fly Box FallBWOs, midges, streamer windowsParachute BWO, zebra midge, olive bugger
Fly family · report suggests “Parachute 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 ↗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 ↗+ 1 more reviewed guide in the Fly Box 01
Start with flow and clarity. If you cannot safely wade or read the pocket water, wait for the river to settle.
02
Fish short accurate casts through boulder pockets, shelf edges, and softer banks instead of blind-casting the heaviest current.
03
On float days, plan around public access and boat handling. The river can be technical when flows are pushy.
04
During summer, fish early and stop when water temperature or closure guidance makes continued trout fishing a bad idea.
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 Stillwater 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.
Common questions
Before you leave.
When is the Stillwater River best for fly fishing?+
It is usually best after runoff drops into shape, during cool summer mornings, and through fall when water temperatures and clarity are favorable.
Is the Stillwater River safe to wade?+
It can be safe at moderate flows, but it is a fast bouldery freestone. High water, slick rocks, and pushy pockets make wading risky.
What should I check before fishing the Stillwater?+
Check RiverReports, USGS 06205000 near Absarokee, Montana regulations, current closure notices, access site status, and the weather forecast.