The major hill range starting from the north is the Sahyadhri (the benevolent mountains) range. This range is home to many hill stations like Matheran, Lonavala-Khandala, Mahabaleshwar, Panchgani, and Amboli onwards. The range is called Sahyadri in Maharashtra, Karnataka and Sahya Parvatam in Kerala.
The pictures below are taken from the road just short of Jugnoo Farms. You can observe the Sahyadhris in the far distance behind.