Wyoming / Rockies
Flat Creek
A Jackson-area Flat Creek report built around the below-Cache-Creek gauge, National Elk Refuge fishing seasons, and realistic low-gradient trout planning near town.
Image: Generated Flat Creek below Cache Creek planning image / BlueStreamFly generated; not exact location / BlueStreamFlyFishability now: Flat Creek fishability today
GreatData confidence: High96/100
Fishable now because the live gauge is stable, weather is mild, and no public alert is active.
Flow observed
2:45 PM UTC
Weather observed
3:00 PM UTC
Score calculated
3:31 PM UTC
Why this rating
Flow
Water temperature
Public alerts
Next 6-12 hours
Hold
Stable live data supports staying with the plan, but recheck the gauge and forecast before leaving.
USGS flow
177 cfs
Current trend: flow stable, so weather, temperature, and access checks drive the next change.
More planning details: flies, flow bands, and live source checks
Fish it today
Start here
Confirm the exact open section first, fish early, and keep a Snake River backup ready if Flat Creek looks warm or crowded.
Best flow clue
Best on moderate clear flows with cool temperatures. Lower autumn windows often fish best because weather improves as access opens.
Skip trigger
Skip when the refuge season is closed, when temperatures are climbing, or when muddy runoff wipes out sightlines and structure.
Flow decision bands
Open reach first
Season dates and posted refuge boundaries decide the day before the below-Cache-Creek gauge does.
Cool clear meadow water
Stable flow, clear sight lines, and cool weather are the best technical-trout signal.
Warm low water
Low warm water should shorten the plan or end trout handling even if the reach is legally open.
Closed or posted water
All refuge waters outside the current open sections should be treated as closed.
USGS flow
177 cfs
Current trend: flow stable, so weather, temperature, and access checks drive the next change.
Live USGS flow
182 cfs / stable
Live NWS forecast
53F / Sunny
Live water temperature
51F from USGS
No NWS alert flag
No active NWS alert was returned for this forecast point.
The refuge page says upper Flat Creek is open from May 1 through November 30 upstream from McBride Bridge to the Bridger-Teton National Forest boundary.
The same page says lower Flat Creek is open only from August 1 through October 31 between posted boundaries and is artificial-flies-only.
All other refuge waters are closed, which makes this a river where posted signs matter as much as fly choice.
Because this is low-gradient Jackson water, temperature and fish handling can decide the day before the flow chart does.
Editorial review
How this report is maintained
This report starts with official regulation, access, flow, weather, and public-land sources, then adds practical planning guidance for fly anglers.
Byline
BlueStreamFly editorial desk
Reviewed by
BlueStreamFly source review
Maintained by
BlueStreamFly
Last material review
2026-06-02
Report confidence
Good confidence
89/100
Good confidence: Wyoming regulation, National Elk Refuge season and boundary rules, hatchery context, RiverReports and USGS 13018350 flow, weather coverage, generated media disclosure, and route-specific Flat Creek guidance support the page. Confidence is moderated by posted boundaries, narrow public seasons, warm low water, wildlife context, and small-water pressure.
Regulations
Wyoming regulation and National Elk Refuge fishing sources support current season, reach, and artificial-fly checks.
Access
National Elk Refuge access and boundary guidance gives strong planning support, with posted signs and current season dates still controlling the day.
Flow and weather
RiverReports, USGS 13018350 below Cache Creek, and the National Weather Service point support live flow and weather decisions.
Fishing usefulness
The page now separates open-section legality, below-Cache-Creek flow, warm-water restraint, technical access, wildlife context, and backup-water choices.
Fishability dashboard and source review
2026-06-02 / material content or source review
Wyoming fishing regulations, 2026 regulation-change information, National Elk Refuge fishing seasons, Jackson hatchery context, RiverReports and USGS 13018350 flow, National Weather Service data, and route-specific media-credit sources were checked before updating the current-fishability decision layer.
2026-06-02
Updated Flat Creek below Cache Creek to the current fishability-page standard with season-first flow bands, refuge access cards, backup cues, stable fishability SEO, and confidence signals.
2026-05-28
Published a new Flat Creek below Cache Creek report with refuge-season rules, gauge support, and low-gradient trout planning near Jackson.
Angler planning edge
Local details that change the plan
Best for
technical small-river trout fishing, late-summer refuge windows, short Jackson-area sessions with strict rules
Wade or float
Treat Flat Creek as a careful wade creek. The value is in precise bank access and controlled drifts, not in covering water fast.
Best flows
Best on moderate clear flows with cool temperatures. Lower autumn windows often fish best because weather improves as access opens.
When to skip
Skip when the refuge season is closed, when temperatures are climbing, or when muddy runoff wipes out sightlines and structure.
Local plan
Confirm the exact open section first, fish early, and keep a Snake River backup ready if Flat Creek looks warm or crowded.
Pressure
This is a well-known Jackson-area option, so the small open windows can concentrate anglers on the obvious posted water.
Access nuance
The right stretch on the right date matters more here than almost anywhere else in the current queue.
Backup water
Move to the Snake or a Yellowstone park day if Flat Creek is closed, warm, or too pressured to fish well.
About the river
Setting, character, and why it fishes the way it does.
Flat Creek near Jackson is not a one-rule water. It changes character and legality by reach, season, and posted boundary, which is why the refuge fishing page matters more here than generalized local hearsay.
The below-Cache-Creek gauge gives a useful trend line for this route, but it does not replace reading the exact season window on the ground. That is especially important because lower Flat Creek has a narrow late-summer and fall public window.
For BlueStreamFly readers, the value of this page is clarity: know which section is open, know how warm the creek is, and treat this as a technical small-river day rather than a guaranteed Jackson checkbox.
Target species
Cutthroat trout
A primary planning species in the Jackson-area meadow and refuge context.
Rainbow trout
Possible depending on the exact reach and management history; verify harvest and handling rules first.
Brown trout
A realistic lower-creek possibility during the later seasonal window.
Refuge wildlife context
Waterfowl, elk, and seasonal closures are part of the plan here whether you like it or not.
Reading the water
Cool clear summer flow
Good only if the posted open reach is in season and the water stays trout-safe.
Late-summer low flow
Fish early, fish lightly, and leave if temperatures climb.
Autumn moderate flow
Often the best lower-section window because access lines up with cooler weather.
Muddy runoff
A pass for this low-gradient route because the creek loses clarity and structure fast.
Best seasons
Late spring
Useful on upper Flat Creek only after May 1 and only if temperatures stay healthy.
Summer
Best on cooler mornings and only on sections currently open under refuge rules.
Late summer to fall
The prime lower-section window because the posted August 1 to October 31 season is open.
Winter
Mostly a nonstarter on refuge-managed sections because the public fishing windows are closed.
Preferred flow source
FLAT CREEK BELOW CACHE CREEK, NEAR JACKSON WY
RiverReports is the preferred chart source when coverage exists. When a matching USGS gauge exists, keep it open as the official backstop for station data and current hydrograph context.
USGS data chart
Official USGS trend
Streamflow over the latest USGS reporting window.
Latest
177 cfs
Jun 3, 4 PM UTC
Weather
River weather report
Weather can change wading safety, road access, water temperature, hatches, and the best time of day to fish.
Live forecast loads as you reach this section
This keeps the report fast while still using the official National Weather Service forecast point.
Hatches and flies
Hatch chart and fly picks
March to April
Midges, little black stones, BWOs, and cold-water nymph windows
Zebra midge, black stonefly, BWO emerger, pheasant tail, perdigon
May to June
Runoff edges, caddis, PMDs, and stonefly activity where the river opens up
Stonefly nymph, caddis pupa, PMD emerger, elk hair caddis, rubber legs
July to September
Caddis, PMDs, terrestrials, ants, beetles, and hopper banks
Chubby Chernobyl, hopper, ant, beetle, X-caddis, parachute Adams
October to winter
BWOs, midges, and short streamer windows in colder water
BWO emerger, midge pupa, olive bugger, sculpin, soft hackle
Dry flies
Chubby Chernobyl, parachute Adams, PMD, BWO, elk hair caddis, ant, beetle
Best when trout are looking up and the banks or meadow edges let you stalk fish cleanly.
Nymphs
Pheasant tail, hare's ear, perdigon, zebra midge, caddis pupa, stonefly
The default choice for runoff edges, cold mornings, and faster slots.
Streamers
Olive bugger, black leech, small sculpin, sparse articulated baitfish
Useful when weather knocks color into the river or bigger fish hug undercuts.
Tactics
How to fish it
Match the trip to the correct refuge section first, then match flies to the water.
Sight-fish or prospect with small accurate drifts instead of covering water blindly.
On warm days, fish early and stop early because temperature is the first serious risk here.
If the posted boundary is unclear, treat it as closed until you know otherwise.
Rigging
Rod, leader, and setup notes
A 4- or 5-weight with a dry-dropper or light nymph rig is the cleanest Flat Creek tool.
Long leaders and smaller flies matter more here than heavy weight or big streamers on most days.
Carry one small streamer for undercuts and lower-light windows, but keep the overall approach technical and restrained.
Access
Access and planning notes
Lower Flat Creek posted section
Late-summer and fall windowWade / float / trail
Refuge wade / artificial flies
When to pick it
Use this only inside the posted August through October lower-section window.
Caution
Posted signs, artificial-fly rules, and warm low water can override a good score.
McBride Bridge upper reference
Upper season orientationWade / float / trail
Refuge boundary / wade
When to pick it
Start here when the upper May through November window is the legal plan.
Caution
The bridge reference does not open every nearby creek bend.
Jackson town and hatchery context
Short technical sessionWade / float / trail
Scout / wade
When to pick it
Pick this when water temperature, pressure, and the exact posted reach all line up.
Caution
Small open windows concentrate anglers and wildlife use.
The refuge page says upper Flat Creek is open from May 1 through November 30 upstream from McBride Bridge to the national forest boundary.
Lower Flat Creek is open only from August 1 through October 31 between posted boundaries and is artificial-flies-only.
All other refuge waters are closed, so do not improvise beyond what the signs and the current refuge page support.
Regulations
Check before fishing
Check Wyoming regulations and the current National Elk Refuge fishing page before fishing because this creek is governed by both state rules and refuge-specific open dates.
Primary base
Jackson, Wyoming
Best day style
Refuge-season windows, bridge and posted-boundary access, and careful low-gradient wading
Check first
Wyoming regulations, the National Elk Refuge fishing page, the 13018350 trend, seasonal posted boundaries, and water temperature
Safety
Warm low water, soft banks, wildlife closures, muddy edges, and posted sections that are not open year-round
Gear
Helpful gear for this water
4- to 6-weight rod
Covers dries, nymphs, small streamers, and afternoon wind.
Thermometer
Essential for summer trout ethics on lower or meadow reaches.
Wading staff
A smart default on slick cobble, undercut banks, and fast tailouts.
Layers and rain shell
Mountain weather turns quickly even on bright mornings.
Nearby water
Other water to research
Backup logic
Season closed
Do not fish Flat Creek; compare Snake River or an open Yellowstone park route.
Heat
Stop trout fishing early and move to colder legal water.
Crowding
Use a different legal reach or switch to Snake River rather than stacking on small water.
Boundary uncertainty
Treat unclear refuge or posted water as closed until confirmed.
Snake River
A bigger Jackson Hole cutthroat option when Flat Creek is closed, warm, or too pressured.
Yellowstone River in Yellowstone Park
A larger native-trout park option when you are ready for different travel and permit logistics.
Madison River in Yellowstone Park
Another park alternative with separate regulations and a different thermal profile.
FAQ
Fast answers
Is Flat Creek fishable today?
Flat Creek looks very fishable right now. The live score is 96/100, based on current flow, weather, public alerts, and the report's planning context. Recheck the linked gauge and forecast before leaving because conditions can change quickly after rain, heat, access changes, or flow swings.
What flow is best for Flat Creek?
Best on moderate clear flows with cool temperatures. Lower autumn windows often fish best because weather improves as access opens.
When should I skip Flat Creek?
Skip when the refuge season is closed, when temperatures are climbing, or when muddy runoff wipes out sightlines and structure.
Is Flat Creek safe to wade right now?
The fishability score is not a wading guarantee. Wade only where your chosen access has safe edges, clear footing, legal entry, and no forced crossings; high, rising, stained, or storm-affected water should be treated conservatively.
When is the lower Flat Creek section below Cache Creek open?
The National Elk Refuge says the lower Flat Creek section is open from August 1 through October 31 between posted boundaries, and it is artificial-flies-only.
What should I check before fishing Flat Creek near Jackson?
Check the refuge fishing page, the posted boundary signs, USGS 13018350, water temperature, and Wyoming regulations before you rig up.
Sources
Source set for this report
Reviewed 2026-06-02