Wyoming Freestone
Greys River Fishing Report, Flows and Hatches
The longest undammed river in Wyoming, a classic cutthroat dry-fly freestone in the Bridger-Teton. Snowmelt blows it out hard in spring and the access road stays snow-gated, so it usually comes into shape in July, when the cutthroat crush attractor dries.
Freestone
Wyoming
5,600 ft
Gauge 13023000
Right now
Live conditions
The hatch chart
Greys River hatch chart
The emergences that come off the Greys by month, straight from the Rivus hatch model.
| Hatch | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Midge Midge, #18-22 | ||||||||||||
Blue Winged Olive Mayfly, #16-20 | ||||||||||||
Salmonfly Stonefly, #4-8 | ||||||||||||
Golden Stonefly Stonefly, #6-10 | ||||||||||||
Little Yellow Sally Stonefly, #12-16 | ||||||||||||
Pale Morning Dun Mayfly, #14-16 | ||||||||||||
Caddisfly Caddis, #12-18 | ||||||||||||
Flying Ant / Carpenter Ant Ant, #12-16 | ||||||||||||
Grasshopper / Terrestrial Hopper, #8-12 | ||||||||||||
October Caddis Caddis, #8-10 |
How it fishes
A Wyoming freestone
A freestone river runs free off snowmelt and rain, so it swings hard with the seasons. It blows out and browns up in spring runoff, then drops and warms into summer. The hatches track the water temperature more than the calendar, so you time your trip to the flow and the thermometer.
Flow and gauge
Reading the flows
The Greys is metered at USGS gauge 13023000. Watch the trend as much as the number: a river that is dropping and clearing fishes very differently from one that is coming up.
Access and regulations
Before you fish
Access and the right to fish are the angler’s responsibility, every time. Public access, private water, and seasonal closures vary along the river, so confirm where you can legally stand and wade before you go. We do not point you to a specific spot.
Read the current rules, license requirements, and any special-regulation water before you go. Regulations change season to season, so check them fresh.
Flow and water temperature from USGS, weather from NWS and NOAA, refreshed hourly. Real-time USGS readings are provisional and subject to revision. The hatch chart and river read are Rivus model output.