The park shares a border with the Peechi-Vazhani and Parambikulam wildlife sanctuaries. The dense foliage and rivers provide an ideal habitat for a vast variety of epiphytes and flowering plants.  Wildlife here includes the endangered lion-tailed macaque, tiger, and leopard, besides others species such as the mongoose, wild dog, jackal, sloth bear, gaur, sambar, barking deer, wild boar, porcupine, bonnet macaque, Nilgiri langur, slender Loris and elephant.
       Altitudes range from 40 m at the dam site to 1,116 m atop the highest peak, Pundimudi. With more than 160 species, it is a haven for bird and butterfly watcher. The Forest Department organizes trekking and bamboo rafting trips, the highest being the Moonlight Sonata- rafting on full moon nights.