Commonly known as the Fort of Peth, Kothaligad stands tall at a height of 3100 feet in the east of Karjat, near Karjat-Murbad road. Prominent features of the fort are temple, and cave at the base and chimney like a tunnel to the top of the fort. Close to the lake, and chimney, there's a water tank. Like the fort, equally beautiful is the trekking route to Kothaligad from Ambivali. To reach the hill, one needs to trek for approximately six kilometers from Ambivali village. The zig zag trails flanked by trees, bushes, and shrubs, makes it a perfect choice for the trekkers.