Wind/Big Horn Basin
About the Wind/Big Horn Basin
The Wind/Big Horn Basin in central Wyoming offers a tale of two rivers. It starts as the Wind River high in the Absaroka and Wind River ranges, then flows through the dramatic Wind River Canyon. At the unification point known as the "Wedding of the Waters" near Thermopolis, it changes names to the Bighorn River, becoming one of the most productive tailwaters in the US.
Key Sections
- Wind River: Most of this river flows through the Wind River Indian Reservation suitable for floating. A special tribal permit is required. It is rugged, western fishing for Brown Trout.
- Big Horn River (Thermopolis): Below Boysen Reservoir, the Bighorn is a biomass factory. With 4,000+ fish per mile, it is famous for its confusingly rich Trico and Pseudocloeon hatches.
- Popo Agie: A tributary near Lander offering excellent small-stream access.
The Tailwater Game
The Bighorn is a year-round destination, but spring (March/April) and Summer (July/August) are peak times. It is a river where "scuds and worms" produce fish all day, but the dry fly fishing during the Trico spinner fall (August mornings) is technical and rewarding.
Fly Fishing Rivers in the Wind/Big Horn Basin
Frequently Asked Questions
What are the best fly fishing rivers in the Wind/Big Horn Basin?
The Fly Fishing Greybull River is widely considered the crown jewel of the Wind/Big Horn Basin, but the area offers many excellent options. Be sure to explore the various tributaries and sections listed in our guide for diverse experiences.
When is the best time to fly fish in the Wind/Big Horn Basin?
While summer (June-September) offers the most consistent dry fly action, the Wind/Big Horn Basin has productive fishing year-round. Fall brings aggressive brown trout and excellent streamer fishing, while spring sees important hatches like Blue Winged Olives. Winter tailwater fisheries can also be excellent.
What fish species can I catch in the Wind/Big Horn Basin?
Anglers can primarily target Brown Trout and Rainbow Trout, with Cutthroat Trout and Brook Trout available in higher elevation streams. Some waters also hold Mountain Whitefish and other species.
