The Tweed River forms the border between Queensland and New South Wales at its mouth. The majority of the Tweed is in New South Wales. Though irrelevant to the question, there is also a Tweed River in the UK, and one in New Zealand.
north of Queensland
the Tweed river is the border between NSW and Queensland
The Macintyre River and the Tweed River each form part of the border between Queensland and New South Wales.
The River Tweed.
The Cheviot Hills
Surprise, surprise, Berwick-on-Tweed is on the River Tweed
The River Tweed is 97 miles long and, no it does not have mountains in it.
The Tweed River in Australia flows eastwards.
The rivers that form part of the border between New South Wales and Queensland are the Dumaresq (pronounced Dew-MERR-eck), the Macintyre and the Tweed. At the coast, the Tweed River forms the first part of the border. Further inland, the Macintyre and Dumaresq Rivers each form part of the border. The entire border is not actually formed by rivers.
The River Till is a tributary of the River Tweed in England. It rises on Comb Fell. It meets the Tweed near Berwick-Upon-Tweed.
The River Tee starts in Cross Fell,Northern England. The mouth of the river is NorthSea. The basin country is England and the length of it is 137 km (87 miles). By the way the source elevation is 760km(2500 feet). The Basin are is 1834km squared(708 miles squared). It rises on the Eastern Slope of Cross fell in Pennines.
The town is called Berwick upon Tweed because it is "upon" the river Tweed.