Kenepuru Sound is one of the larger of the Marlborough Sounds

Marlborough Sounds

The Marlborough Sounds are an extensive network of sea-drowned valleys created by a combination of land subsidence and rising sea levels at the north of the South Island of New Zealand...

 in the 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...

 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...

. The drowned valley is an arm of Pelorus Sound

Pelorus Sound

Pelorus Sound is the largest of the sounds which make up the Marlborough Sounds at the north of the South Island, New Zealand. The Marlborough Sounds is a system of drowned river valleys, which were formed after the last ice age around 10,000 years ago...

, it runs for 25 kilometres from the northeast to southwest, joining Pelorus Sound a quarter of the way down the latter's path to the Cook Strait

Cook Strait

Cook Strait is the strait between the North and South Islands of New Zealand. It connects the Tasman Sea on the west with the South Pacific Ocean on the east....

.

Queen Charlotte Sound

Queen Charlotte Sound, New Zealand

Queen Charlotte Sound is the easternmost of the main sounds of the Marlborough Sounds, in New Zealand's South Island. It is, like the other sounds, a drowned river valley , and like the majority of its neighbours it runs southwest to northeast before joining Cook Strait.The town of Picton, the...

, the largest sound in Marlborough

Marlborough, New Zealand

Marlborough is one of the regions of New Zealand, located in the northeast of the South Island. Marlborough is a unitary authority, both a region and a district, and its council is located at Blenheim. Marlborough is known for its dry climate, the picturesque Marlborough Sounds, and sauvignon blanc...

, lies to the southeast, parallel to Kenepuru Sound. Some of the small side arms of the two sounds are only hundreds of metres apart, but are separated by a steep serrated range of hills. Not surprisingly, one of the settlements on this stretch of coast is called Portage, named for the simplest method of passing between the two sounds.