Mount Kalsubai is considered to be the highest mountain peak of the Sahyadri range. This mountain peak is around 1,646 m in height and was used for keeping watch on their enemies during the Maratha rule in the region.Mount Kalsubai is a famous trekking destination which features Kalsubai Temple, Ratangad Fort and Harishchandragad Fort. The Kalsubai Temple houses an old well, where the water level never drops below 3 ft. A religious fair is organised by the locals at this temple, between October and November.September through February is the best time to trek in this mountain range, which is situated in the Igatpuri region.