The Noyyal river originating from Velliangiri hills is one of the major tributaries of the Cauvery, which irrigates about 100,000 of hectares of agricultural land in the plains.

The Velliangiri hills watershed feeds into the Siruvani dam, which is the main drinking water supply for 1,500,000 people in the urban centre of Coimbatore.

[citation needed] According to the Kachiappar Perur Purana, Shiva in the hill of Kailayam (Mount Kailash), was worshipped by Lord Vishnu-Komuni.

Because of the santamarutham, 8 kodumudigal (parts) fell from kailasam into 8 different places which are Thirugonamalai (Trincomalee), Thirukalahasti, Thiruchiramalai, Thiruenkoimalai, Velliangiri Mountains at Tamil Nadu, Neerthagiri, Ratnagiri, and Swethagiri or Thirupangeeli.

The five faces of Shiva, Brahma, Vishnu, Rudra, Maheshwara and Sadasiva, are seen as Panchagiri and as Panchalingas pertaining to the panchabhutas, in Velliangiri.

Lord Panchalingesa and his Consort Manonmani amman alias Parvathi, bestow their grace on the devotees who throng here annually between February and May.

During trekking season, forest check post at base camp filter plastics which may harm wild animals and pollute the environment.