Kalsubai () is a mountain in the Western Ghats, located in the Indian state of Maharashtra. Its summit, situated at an elevation of , is the highest point in Maharashtra. The mountain range lies within the Kalsubai-Harishchandragad Wildlife Sanctuary. It is visited throughout the year by avid trekkers, Kalsubai temple devotees and wildlife enthusiasts alike. It is named after one of the three sisters Kalsubai, Ratnabai and Katrabai. The other peak Ratangad is named after Ratnabai. Geology The mountain range was formed by the same geological events that gave birth to the Western Ghats. Resting on the Deccan Plateau, a large igneous province, it consists of solidified flood basalt dating back to the Cenozoic era. Geography and topography The peak along with the adjoining hills spans along a downward-slanting east to the west axis eventually merging with the formidable escarpment of the Western Ghats at almost right angles. Along its length, they form a natural boundary demarcating the Igatpuri Taluka, Nashik district at its north from the Akole Taluka, Ahmednagar district at its south. The mountain itself lies on the Deccan Plateau, with its base at an elevation of above mean sea level. The mountain along with adjoining hills forms an enormous catchment area for the Arthur Lake which it overlooks. Reaching Kalsubai The mountain can be viewed in its entirety from Bari village located on its eastern side, about from Bhandardara. It can be reached by road, via Igatpuri on the Mumbai-Nasik route. Trains leaving from Mumbai provide an alternate mode of transport to Kasara railway station, with connecting State Transport buses, plying on the Akole-Kasara route, leading up to the base village. Private vehicles from Kasara provide yet another alternative to public transport. Trekking Kalsubai is a trek with an elevation gain of around . This is a one-day trek having a moderately hard difficulty level, with lush green landscapes and multiple waterfalls. The peak attracts many trekkers and devotees determined to scale the mountain. To reach the summit there are well-designated trekking routes. The most popular route is through the eastern mountain face taking off from the base village Bari. The krushnavanti river, a tributary of Pravara, takes origin on its eastern slope and flows like a stream through the outer fringes of Bari. A short distance away from the stream a Hanuman temple has been built. This provides an important landmark to commence the trek as