Pleasant Valley is an alluvial floodplain created by the Haast River, in the Southern Alps of the South Island of New Zealand.

Today there is a Department of Conservation campsite at the Flat, with toilets, a picnic shelter, and a short forest walk along nearby Muir Creek.

Common forest birds that can be observed are bellbirds (Anthornis melanura), grey warblers (Gerygone igata), tomtits (Petroica macrocephala), and long-tailed cuckoos (Eudynamys taitensis), while moreporks (Ninox novaeseelandiae) can be heard at night, and South Island oystercatchers (Haematopus finschi) will sometimes feed at the campsite.

[3] The Haast and Lansborough valleys contain populations of kākā (Nestor meridionalis), yellow-crowned kākāriki (Cyanoramphus auriceps), and whio (Hymenolaimus malacorhynchos).

However, weka (Gallirallus australis) are no longer common in southern Westland and kākāpō (Strigops habroptilus) are long gone from mainland New Zealand.