Bighorn River Thermopolis, Wyoming. The Bighorn River is our main water that we fish and guide with local guides who live right in Thermopolis, Wyoming. Dunoir Fishing Adventures has private access and owns 100 acres of property right on the Bighorn River. Our guide service runs a legitimate and professional business operating under BLM Special Use Permits, setting us apart from other guide services. We are developing our Bighorn River Fish Camp in Thermopolis with lodging and fishing packages coming soon. Be prepared to catch trophy trout on a variety of flies ranging from small nymphs to giant hopper patterns depending on the season. This is truly one of the finest rivers to drift boat fish in Wyoming, and our local professional guides work hard to put you on the fish. Better yet, it rarely sees crowds of people and you can soak in the mineral hot springs at the end of the day at Hot Springs State Park. Expect to catch: Browns, Yellowstone Cutthroats, Rainbows, and Whitefish. Our guide service is permitted by the Bighorn Basin BLM under Special Use Permit # 1101.