Peak Wilderness Sanctuary is a sanctuary of of land area, which was established on 25 October 1940. Horton Plains National Park adjoins the eastern boundary. Horton Plains National Park has been originally designated a nature reserve on 5 December 1969 later elevated to the national park status on 16 March 1988. Knuckles mountain range is situated to the northeast and its relict, endemic flora and fauna is distinct from montane forest of central massif.