Rakituma / Preservation Inlet is the southernmost fiord in Fiordland National Park and lies on the southwest corner of the South Island of New Zealand.

The main passage of the fiord sits to the north of the island and is 1.67 kilometres (1.04 mi) wide at its narrowest point.

Otago Retreat separates Coal Island from the mainland to the south, which has an average width of less than a kilometre and just 375 metres (1,230 ft) at its narrowest point.

Both the European and Māori portions of this name refer to the fiord's length, with Awaroa translating as "long river".

A large part of the interior of Preservation Inlet is protected by the Te Tapuwae o Hua (Long Sound) Marine Reserve.

However by 1904 only a few miners were left, and few traces of the settlements remain though in places large pieces of rusting equipment can be seen in the regenerating bush at the sites of the historic Alpha and Golden Mines.