 The Lugton Water, the largest tributary of the Garnock, runs from Loch Libo (395 feet above sea-level) in Uplawmoor, through Lugton and the parishes of Neilston, Beith, Dunlop, Stewarton and Kilwinning.The Lugton joins the Garnock below the tidal limit, shortly after passing through Eglinton Country Park, developed around the ancient estate of the Earl of Eglinton.The two main rivers of North Ayrshire, the Irvine and the Garnock, come together in the estuary at Irvine Harbour where they jointly enter the Firth of Clyde.