The sanctuary is part of the Western Ghats, a UNESCO World Heritage Site recognized as one of the world's eight hottest biodiversity hotspots.
The Chimmini Dam, which forms the sanctuary's reservoir, was commissioned primarily for irrigation and water supply purposes for the surrounding agricultural plains.
The sanctuary is home to the vulnerable Malabar giant squirrel and the endangered Nilgiri langur.
The forest type transitions from moist deciduous at lower elevations to tropical evergreen in the higher reaches of the Punda range.
Studies have recorded over 150 species of medicinal plants native to this specific patch of the Western Ghats.
The sanctuary's ecosystem is integral to the drainage basin of the Chimmini River, a tributary of the Kurumali River.
Chimmini Wildlife Sanctuary is a protected area in the Thrissur district of Kerala, centered around the 10-square-kilometer reservoir created by the Chimmini Dam. Established in 1984, the sanctuary covers approximately 85 square kilometers of tropical evergreen, semi-evergreen, and moist deciduous forests. It serves as a crucial corridor for the movement of Asian elephants and other megafauna between the Peechi-Vazhani and Parambikulam wildlife sanctuaries. The landscape is dominated by the Western Ghats, with the highest point being the Punda Peak at 1,116 meters. Biodiversity surveys have identified over 160 species of birds and a significant population of butterflies within the sanctuary limits. The sanctuary functions under the Kerala Forest Department, which manages regulated eco-tourism activities, including trekking and bamboo rafting. Visitors can explore the reservoir waters, which provide a vantage point for observing wildlife along the forest-fringed banks. The area is located in a high-rainfall zone, contributing to the dense canopy cover of the local ecosystem.
The elevated view from the Chimmini Dam wall overlooking the reservoir and the surrounding dense forest backdrop.
Book guided trekking programs in advance through the Forest Department office at the entrance, as unguided entry is prohibited.
Carry binoculars and a high-zoom camera, as wildlife sightings are often at a distance across the reservoir or high in the canopy.
Wear leech-proof socks or gaiters if visiting during or immediately after the monsoon season.
Do not attempt to swim in the reservoir or approach wild animals if spotted; remain inside designated eco-tourism zones.
Operations may be suspended during peak monsoon months or periods of extreme weather due to safety concerns and trail conditions.
Plastic is strictly prohibited within the sanctuary; visitors must carry out all personal waste. Maintain silence to increase chances of wildlife spotting and follow all instructions from forest guides.
