Idaho is famous for its blue-ribbon trout fishing streams, shimmering lakes and expansive reservoirs that tempt anglers with the promise of diverse fishing. In the spring, summer and fall don't miss the chance to wrangle big, powerful king salmon or steelhead on several Idaho rivers. Idaho is the only inland state in the western U.S. where you can catch these treasured fish and take advantage of a wide variety fisheries. Scenic and wild, the Little Salmon River is a tributary of the Salmon River which is the longest free-flowing river (425 miles) within one state in the lower 48. Resident species are Bull Trout, Westslope Cutthroat, and Rainbows.