Unquestionably one of the greatest trout rivers in the world, the Bighorn River is a fly angler's dream come true! The Bighorn River's cool, clear flows emerge from the base of Yellowtail Dam in Fort Smith, Montana. Its trout-filled waters and abundant insect hatches produce exceptional rainbow and brown trout fishing year-round for both novice and expert anglers alike. Consisting of the most hardworking and courteous guides in Montana, our expert guide staff is second to none. Our Orvis-authorized fly shop is fully stocked with everything an angler could need.