Lake Alabaster

Lake Alabaster
Location	South Island
Coordinates	44°31′S 168°10′E / 44.517°S 168.167°ECoordinates: 44°31′S 168°10′E / 44.517°S 168.167°E
Primary inflows	Pyke River
Primary outflows	Pyke River
Basin countries	New Zealand
Max. length	6 km
Surface area	7 km²

Lake Alabaster, also known by the Maori name of Waiwahuika, lies at the northern end of Fiordland, in the southwest of New Zealand's South Island. The lake runs from northeast to southwest, is six kilometres in length, and covers 7 km².

Lake Alabaster drains, and is drained by, the Pyke River, a small tributary of the Hollyford River. It is one of two lakes (along with Lake McKerrow) found in the lower reaches of the Hollyford River system. A branch of the Hollyford Track, one of New Zealand's most well-known and popular tramping tracks, extends along the eastern shore of the lake.

The lake was formed at the southern end of a glacial valley and, had the sea level been slightly higher, would have been the northern arm of what might have been McKerrow Fiord.