Olimarao Atoll is an uninhabited atoll in the State of Yap in the Federated States of Micronesia. It is located 5 kilometers northwest of Elato and 860 kilometers southeast of Yap island. Olimarao belongs administratively to Elato.
The atoll's surface is 11 km² and it is roughly 5 km long and 3 km wide. The lagoon has a surface of about 6 km² and two passages into it located in the southern fringes of the reef.[1]
The whole atoll is part of the Olimarao Conservation Area. This zone is meant to protect the breeding places of sea turtles, coconut crabs and pelagic birds. [2]
There are only two small islets (Motus) on the reef, with a total surface of 0,2 km² (20 Hectares).[3] Both islands have coconut palms, among other vegetation, like Scaevola taccada bushes: