The Sierra de Manantlán is a mountain range located in western Mexico, primarily within the states of Jalisco and Colima. It is part of the larger Sierra Madre del Sur and is known for its rich biodiversity, hosting numerous plant and animal species, some of which are endemic to the region. The area is also recognized for its unique ecosystems, including cloud forests and tropical deciduous forests. Designated as a Biosphere Reserve in 2006, the Sierra de Manantlán aims to protect its natural resources and promote sustainable development. The reserve covers approximately 1,200 square kilometers and is a popular destination for ecotourism, attracting visitors interested in hiking, birdwatching, and exploring its diverse landscapes.