The Pegunungan Arfak Nature Reserve lies in the north-east corner of the Bird's Head Peninsula in the Indonesian province of West Papua.

It spans from near the coast up to the highest point in the province, Pegunungan Arfak, at 2,955 m (9,695 ft).

Surveys indicate 110 species of mammals, of which twenty-one are endemic to the island of New Guinea tree kangaroos, forest wallabies, bandicoots, possums, and cuscus.

Anggi Giji and Gita are two lakes located high in the mountains and further adorn this landscape.

Over time, this reserve becomes an interesting gathering place for domestic and foreign researchers.