Experience Fly Fishing for Smallmouth Bass on the Beautiful Susquehanna an Juniatia River’s in South Central Pennsylvania.The Susquehanna and Juniatia River’s are fertile limestone river’s home to one of the best smallmouth fisheries in the East. These majestic river’s are rich in food, with rocks and wide shallow riffles laden with nymphs, crayfish, and other foods. This environment ensures prolific hatches and rapid growth rates for both forage and game fish.