Pathanamthitta is a district located in the southern Indian state of Kerala. It is situated in the central part of the state, bordering the districts of Kottayam, Idukki, Alappuzha, and Kollam. The district has an area of 2,640 square kilometers and is characterized by a hilly terrain with several rivers, streams, and forests.

The district is part of the Western Ghats, a mountain range that runs parallel to the west coast of India. The Western Ghats are a UNESCO World Heritage Site and are known for their unique biodiversity and ecological importance. Pathanamthitta is home to several important rivers, including the Pamba, the Achankovil, and the Manimala. The Pamba river is particularly important as it is considered sacred by the Hindus and is home to the famous Sabarimala temple.

The district is also known for its rich forest cover, which includes evergreen and deciduous forests. The Konni forest, which is located in Pathanamthitta, is home to several species of wildlife, including elephants, tigers, leopards, and several species of birds.

Pathanamthitta has a tropical climate, with hot and humid summers and mild winters. The monsoon season, which lasts from June to September, brings heavy rainfall to the region, which is essential for the cultivation of crops like rice, rubber, and coconut.

Overall, the geography of Pathanamthitta is characterized by its hilly terrain, rivers, forests, and rich biodiversity, making it a popular destination for nature lovers and adventure seekers.