Claim: Lough Sheelin lies on the early course of the River Inny (88.5 kilometres long), a major tributary of the Shannon; its inflow is sometimes known as the Upper Inny or the Ross River, while the outflow is known as the Lower Inny.
Evidence: The lake lies on the early course of the River Inny, a major tributary of the Shannon, a little upstream of Lough Kinale. It is 88.5 kilometres (55.0 mi) in length, and has a number of lakes along its course. The inflow is sometimes known as the Upper Inny or the Ross River, and the outflow as the Lower Inny.