The Moyle River is a river in the Northern Territory, Australia. The river rises on a plateau area near the Wingate Mountains and flows in a north westerly direction through mostly uninhabited country through a narrow valley then across the Moyle Plain and eventually discharging about 30 kilometres north east of Port Keats into Hyland Bay and then the Tim…The Moyle River is a river in the Northern Territory, Australia. The river rises on a plateau area near the Wingate Mountains and flows in a north westerly direction through mostly uninhabited country through a narrow valley then across the Moyle Plain and eventually discharging about 30 kilometres north east of Port Keats into Hyland Bay and then the Timor Sea.