The Barwon Highway is one of the more obscure state highways of Queensland. It starts at the Carnarvon Highway in Nindigully, 44 kilometres south of St George, and travels east for about 155 kilometres until it reaches Goondiwindi, where it terminates at the Leichhardt Highway.The highway travels north of and roughly parallel to the Barwon River, after which it is named. The river forms part of the border between Queensland and New South Wales.