The Sigur Plateau is located in the northern part of the Nilgiris district with the Moyar Gorge separating the plateau from the Mysore region. The average elevation of the Sigur plateau is 900 MSL. The boundaries of the Sigur plateau are the Moyar Gorge in the north, Moyar River on the east, Wynad district and the Nilgiris massif in the south. There are five major streams in the Sigur plateau, namely, the Moyar River, Sigur River, Avarahalla River, Kedarhalla River and Gundattihalla River. All these rivers originate in the Nilgiris plateau. The Nilgiris have several valley systems ranging in elevation between 1800 m and 2200 m drained by the Bhavani, Kundah, Hadathoraihalli, Kukalthorai halla, Sigur, Pykara, and other minor rivers some of which have been dammed up during the last five decades.
The plateau is a low rainfall marginal land with poor soils and till recent times, also had a low population density. West Sigur receives less than 500 mm annually, while the eastern part receives more than 1000 mm of rainfall. The difference in rainfall also contributes to the dry deciduous forests in the west part of Sigur while the eastern part has more scrub jungle.All along the river courses, dense riparian forest are seen in the western and eastern parts of the plateau while in the east, the vegetation forms scrub jungles. This diversity in rainfall has led to the profusion of a unique floral diversity harbouring giant trees along the riverine patches, multiple canopy layers in the west and an almost desert like stunted vegetation on the east. Though presenting a desolate view, the scrub lands are host to numerous floral and faunal species.