The Leatham River is a river of the Marlborough Region of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

's South Island

South Island

The South Island is the larger of the two major islands of New Zealand, the other being the more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, to the south and east by the Pacific Ocean...

. It is the main tributary of the Branch River

Branch River, New Zealand

The Branch River is a river of New Zealand. It is a short tributary of the Taylor River, flowing north for 10 kilometres to meet the Taylor 12 kilometres south of the town of Blenheim....

, itself a tributary of the Wairau River

Wairau River

The Wairau River is one of the longest rivers in New Zealand's South Island. It flows for 170 kilometres from the Spenser Mountains , firstly in a northwards direction and then northeast down a long, straight valley in inland Marlborough.The river's lower reaches are noted for the surrounding...

. The Leatham flows north in a parallel valley to the Branch for most of its length before turning northwest to join with the Branch six kilometres from its outflow into the Wairau 40 kilometres south of Richmond, New Zealand

Richmond, New Zealand

Richmond, the seat of the Tasman District Council, lies 13 km south of Nelson in the South Island of New Zealand, close to the southern extremity of Tasman Bay...

.