Karnataka State boundary covering the area of Odanthode Malavaram, which is continuous with the Kottiyoor Reserve Forests up to Chavachithode of Coorg District.
Wayanad District boundary up to the part where Chavachithode begins.
Chavachimala covering North Western Portion of Kottiyoor Reserve Forests where Chavachithode joins at Cheenkannipuzha and then through the southern boundary of Odanthodemala and Aralam I & III Ranges up to Valayamchal where its trenches meet the eastern boundary of Central State Farm in the Western boundary of Aralam I &III Ranges.
Eastern boundary of Central State Farm, Aralam and Western boundary of Adakkathode beat of Manathana Section.
The legal boundaries are not in consonance with the ecological boundaries of the sanctuary. There are extensive evergreen and semi-evergreen forest areas in the immediate vicinity of the sanctuary, which are not under protected area management.
The vested forest areas such as Chathiroormala and Neerkunnumala in the north and the remaining portion of Kottiyoor RF in the south, which are under the territorial jurisdiction of Kannur Forest Division, are equally or more rich in varied flora and fauna.
These natural forests in the north and south of the sanctuary’s legal boundaries need to be brought under the protected area management for serving the cause of wildlife conservation in a better way.
The Sanctuary has been divided into three sections. The boundaries of these sections are given below: