The Cuban moist forests is a tropical moist broadleaf forest ecoregion that occupies 21,400 km2 on Cuba and Isla de la Juventud. The ecoregion receives more than 2,000 mm (79 in) of rainfall annually, and does not have a dry season. Soils are usually derived from quartz, limestone, or serpentinites. Cuban moist forests can be differentiated into lowland forests, sub-montane forests, and montane forests.