Tambroso is a mountain peak on the Azorian island of Faial. It is located in the civil parish of Ribeirinha, in the municipality of Horta. The mountain, as well as its surrounding land-forms, is geographically close to the volcanic caldera at the center of Faial. The eruptive igneous rocks produced by this caldera forms the base of Tambroso, as well as many other peaks on Faial Island. The whole series of peaks has a maximum elevation at Cabeço Gordo, which is 1,043 metres (3,422 ft) above sea level.