Tinhosa Grande is an uninhabited islet in [São Tomé and Príncipe](https://bliptext.com/articles/s-o-tom-and-pr-ncipe), located 23 km southwest of the island of Príncipe and 124 km northeast of the island of São Tomé. Together with the smaller islet Tinhosa Pequena, 4 kilometers to its north, it forms the Pedras Tinhosas group. It is 55 metres high, and its area is 20 hectare. Since 2012, it forms a part of the UNESCO's Island of Príncipe Biosphere Reserve. A species of skinks found on the islet, Trachylepis adamastor, was first described in 2015.