Shannon River Basin a measurement of . When added to the Shannon's estuary this gives a total river flow of , which makes it the longest river within the River Shannon basin (from source to mouth)— longer than the Shannon Pot source. Thus the Boyle-Shannon river can be regarded as having the longest natural river flow in Ireland. The River Shannon Basin touches more than half (17) of Ireland's counties:- Limerick, Clare, Tipperary, Offaly, Westmeath, Longford, Roscommon, Kerry, Galway, Leitrim, Cavan, Sligo, Mayo, Cork, Laois, Meath and Fermanagh. There are many towns situated in the Shannon Basin. Towns and Villages (with 2011 populations)
Gerry Reilly Cup Dublin were the 2006 champions having defeated Westmeath 4-13 to 1-8 in the decider in Gilson Park, Oldcastle, County Meath. In 2007, Meath prevented Dublin from retaining the title by defeating them by 4-09 to 0-12 at Oldcastle. Eight counties competed in 2016 including Meath, Monaghan, Cavan, Westmeath, Dublin, Wicklow, Louth & Longford with Cavan winning the Cup final by overcoming Dublin in the final with Meath securing the Plate with a decisive victory over Westmeath. In 2017 eight counties have again entered the completion with Group 1 comprising Louth, Longford, Laois and Meath. Group 2 includes Dublin, Westmeath, Monaghan