Wyoming Spring creek
Firehole River Fishing Report, Flows and Hatches
A geothermal river inside Yellowstone National Park, warmed by hot springs into unique early-season hatches. It closes midsummer when the water runs too warm, so spring and fall are the seasons. A park permit is required, and there is no state license here.
Spring creek
Wyoming
7,200 ft
Gauge 06036905
Right now
Live conditions
The hatch chart
Firehole River hatch chart
The emergences that come off the Firehole 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 | ||||||||||||
Caddisfly Caddis, #14-18 | ||||||||||||
Pale Morning Dun Mayfly, #14-18 | ||||||||||||
Green Drake Mayfly, #10-12 | ||||||||||||
Brown Drake Mayfly, #10-12 | ||||||||||||
Pale Evening Dun Mayfly, #16-18 | ||||||||||||
Callibaetis Mayfly, #14-16 | ||||||||||||
Mahogany Dun Mayfly, #14-16 | ||||||||||||
Grasshopper / Terrestrial Hopper, #8-10 |
How it fishes
A Wyoming spring creek
A spring creek wells up from the ground at a near-constant temperature, so it stays clear, cold, and stable through the year. The water is rich and the fish see everything, which makes for technical, small-fly fishing and long, fine leaders.
Flow and gauge
Reading the flows
The Firehole is metered at USGS gauge 06036905. 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.