The Himalayan subtropical broadleaf forests is an ecoregion that extends from the middle hills of central Nepal through Darjeeling into Bhutan and also into the Indian States of Uttar Pradesh and Bihar. It represents the east-west-directed band of subtropical broadleaf forest at an altitude of between 500 to 1,000 m (1,600 to 3,300 ft) along the Outer Himalayan Range, and includes several forest types traversing an east to west moisture gradient.