Wade · Best fitCheck
Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.
Menu
All Wyoming reports
Fly fishing report · West
North Platte River at Grey Reef
A Grey Reef tailwater report tied to current USBR discharge, the exact Dam-to-Government Bridge rule, and two separate spring spawning closures—without pretending an obsolete USGS gauge is live.
Check flow & weatherToday's river scoreLive calculation
0
Poor
Best option: Wade.
Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.
Returned dataMedium reliabilityReliability of the flow, weather, and alert data that returned.
Today's decisionHigh confidenceA verified hard stop is active, so the avoid-or-wait decision is clearer than the fishing score itself.
Score calculated Aug 10, 12:59 AM UTCLive sources checked regularly
Recommended approachWade
Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.
Bank / edgeCheck
Bank and edge fishing is the safer default when water is high, pushy, or not fully verified.
FloatCheck
A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
Red Flag Warning issued August 9 at 12:55AM MDT until August 9 at 9:00PM MDT by NWS Riverton WY
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
Check USBR discharge and the exact closure segments before choosing a launch.
Grey Reef is not one undifferentiated tailwater. The core rule applies from Gray Reef Dam to Government Bridge, while two smaller subreaches close April 1 through May 15. Use current USBR GGWY discharge and route around only the segments actually closed.
- USBR GGWY is the current official river-discharge station; USGS 06642000 ended continuous discharge in 1998 and is not configured as live.
- The gauge-cable closed area and the Ledge Creek-to-S Gulch closed area are separate April 1-May 15 hard stops.
- Do not present the entire Dam-to-Government Bridge reach as closed during the spawning period.
- Annual flushing-flow notices and active severe-weather alerts are same-day safety overrides.
Why this score moved
Public alertLowers score
An active alert is in effect: Red Flag Warning issued August 9 at 12:55AM MDT until August 9 at 9:00PM MDT by NWS Riverton WY. Check public safety sources before going.
Best mode nowLowers score
Wade: Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.
FlowUse caution
RiverReports is linked for the flow chart, but this page does not have a structured live flow value the score can read automatically. Treat the rating as conservative and open the chart before committing.
HeatUse caution
The NWS forecast is near 92F. Fish early and verify water temperature where trout stress is possible.
Local scoring depthUse caution
This page is using baseline river-specific guidance while deeper local scoring is still being reviewed. Use the live sources and local checks before relying on the rating.
Read the water
What changes the plan.
A fresh stable USBR trend, open chosen subreach, manageable wind, and legal launch make the cleanest nymph, dry-fly, or streamer plan. Because USBR is not yet a structured score provider, flow-dependent score confidence must remain limited rather than borrowing a dead USGS feed.
Stable USBR trend
Choose an open segment and match depth, weight, and boat plan to the actual release.
Flushing flow or sharp change
Treat the official notice as a hard safety override and stay off the river during the pulse.
Spring closure dates
Route around the two signed closed subreaches; do not fish or launch into them.
High wind or lightning
Avoid exposed floats and open-river launches even when discharge looks favorable.
Field plan
Fish it with intention.
Best flows
Favor a fresh stable USBR GGWY trend that fits the chosen wade or boat plan. The page intentionally avoids a universal threshold and a dead USGS shortcut.
When to skip
Skip for active flushing flows, severe wind or lightning, an inaccessible launch, unknown current discharge, or any plan that enters a signed spring closure.
Local plan
Choose the open segment and access first, check GGWY, verify the closure dates and signs, then rig for the depth you actually find.
Backup water
Use another open Grey Reef segment or a separately verified Wyoming river rather than fishing a closure or forcing unsafe wind.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
Year-roundMidges; scuds, annelids, and leeches are food rather than hatchesZebra midge, black beauty, scud, San Juan worm, small leech
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 “black beauty”Black Beauty MidgeA very slim black thread body, fine silver rib, and small dark thorax define the core Black Beauty. Glass-bead Mercury Black Beauty and flash-wing variants must stay labeled separately.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box SpringBWOs and midgesRS2, BWO emerger, pheasant tail, Griffith's gnat
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 ↗
Reviewed family · report says “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 ↗+ 2 more reviewed guides in the Fly Box Early to midsummerPMDs, caddis, and Yellow SalliesPMD emerger, caddis pupa, elk hair caddis, yellow sally
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 ↗
Reviewed family · report says “caddis pupa”Caddis Pupa PatternsCaddis pupa is a life-stage family. Curved bodies, wing pads, legs, beads, and soft-hackle collars differ among exact patterns and must be labeled.See family guide ↗+ 2 more reviewed guides in the Fly Box Late summer to fallTricos, caddis, BWOs, and midgesTrico spinner, caddis, BWO, zebra midge
Reviewed pattern · report says “Trico spinner”Trico SpinnerThe reviewed dry form is extremely sparse and flat, using a black body or thread head and pale spent wing. A weighted Sunken Trico Spinner is a separate variant.See photos & how to fish it ↗
Reviewed family · report says “caddis”Caddis Patterns by StageCaddis is not one fly. Larvae live below, pupae and emergers rise through the column, tent-wing adults ride or move on top, and spent forms create other silhouettes.See family guide ↗+ 2 more reviewed guides in the Fly Box 01
Open USBR GGWY and the current rule map before choosing dam, ramp, or downstream access.
02
During April 1-May 15, identify both closed subreaches and build the trip around water that remains legally open.
03
Use compact nymph rigs with precise depth before changing patterns repeatedly.
04
Fish small dries only to consistent risers during midge, BWO, PMD, or trico windows.
05
For floats, account for wind, release changes, private-bank markers, and the takeout before launching.
Access & responsibility
Know the entry. Know the exit.
From Gray Reef Dam to Wyoming Highway 220/Government Bridge, the 2026 rule is one trout with all trout under 20 inches released, single-point barbless-hook artificial flies or lures only, and pegged attractors prohibited. Separate signed segments at the gauge cables and from Ledge Creek toward S Gulch close April 1-May 15. Current Wyoming rules and signs are the legal authority.
Gray Reef Dam recreation area
USBR documents the fishing pier, restroom, primitive camp, small-craft launch, and ramp/parking roughly one-half mile below the dam.
Ledge Creek
BLM identifies this as watercraft-only access with public/private boundary markers; it is also part of a spring closure boundary and must be checked carefully.
Government Bridge corridor
The downstream endpoint for the core special-rule reach; verify current public access and private-bank markers before a float.
Rules and notices
Check the exact reach before you fish.
Official rules and access notices stay separate from fishing advice. Follow the linked authority if signs or current notices disagree with this summary.
Seasonal — check datesSeasonal closure
Grey Reef gauge-cable spring closure
Applies to: Between the signed gauge-cable crossings, with the first crossing about 700 yards below Gray Reef Dam
When: April 1-May 15 annually
Source reviewed:
This is one signed subreach, not a closure of the full dam-to-Government Bridge corridor.
Open the official sourceSeasonal — check datesSeasonal closure
Grey Reef Ledge Creek to S Gulch spring closure
Applies to: Ledge Creek confluence downstream about 1.2 miles to S Gulch
When: April 1-May 15 annually
Source reviewed:
This is a second, separate signed subreach, not a closure of the full tailwater.
Open the official sourceRecent reach reports
What anglers are seeing.
Moderated, river-level updates for North Platte River at Grey Reef. 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.
flowRiverReports: North Platte River at Grey ReefflowUSBR GGWY current North Platte discharge below Gray ReefflowUSBR HydroMet Wyoming station registryregulation2026 Wyoming fishing regulationsregulationGrey Reef gauge-cable spring closureregulationGrey Reef Ledge Creek to S Gulch spring closureregulationWyoming 2026 fishing regulation changesaccessUSBR Gray Reef recreation facilitiesaccessRecreation.gov Gray Reef ReservoiraccessBLM Ledge Creek watercraft-only accesssafetyUSBR flushing-flow safety noticessafetyWyoming updated Gray Reef flushing-flow safety noticesafetyNational Weather Service point forecast
Common questions
Before you leave.
What water does this North Platte at Grey Reef report cover?+
The regulated tailwater from Gray Reef Dam toward Highway 220/Government Bridge, with two spring closure subreaches identified separately.
What should I check first before fishing North Platte at Grey Reef?+
Check USBR GGWY discharge, Wyoming's 2026 rule, both April 1-May 15 closure boundaries, flushing notices, wind, and the exact launch or access.
Is access straightforward on North Platte at Grey Reef?+
Official dam and BLM access exists, but Ledge Creek is watercraft-only and public/private bank markers still control downstream use.
Does the fishability score replace local judgment?+
No. Use it as a starting decision, then confirm the source timestamp, official rules, alerts, water temperature, visibility, and conditions at the access you actually plan to use.