Pulau Mas Nature Reserve

Pulau Mas Nature Reserve (Cagar Alam Pulau Mas) is a small island nature reserve off the northern coast of Gorontalo Utara Regency in Gorontalo Province, Sulawesi, Indonesia. Designated as a strict nature reserve (Cagar Alam), it protects lowland forest, coastal vegetation and surrounding marine habitats. The island is uninhabited and managed for conservation and scientific research, notable for its relatively undisturbed island ecosystem, coral reefs and importance as habitat for seabirds and other wildlife.

Pulau Mas is a strict nature reserve (Cagar Alam) and is not developed as a public tourist destination. Visitors can expect an uninhabited, forested island surrounded by clear waters and coral reefs, with no visitor facilities, jetties or accommodation. Access is restricted and requires prior permit from the conservation authority (BKSDA). Where permitted, visits are limited to low-impact activities such as nature observation and photography under supervision, with the landscape remaining in a natural, undisturbed state.

Designated as Cagar Alam (Strict Nature Reserve) under Indonesia's nature conservation system and managed by the Natural Resources Conservation Agency (BKSDA), Pulau Mas has been retained as a protected area for the preservation of its island forest and marine ecosystem and for scientific purposes.