Peth fort is a small garrison fort in the shape of a submarine, ~20 kms off from Karjat. We took a bus, and two autos to reach the highway near the base village. March being a hot month, made sure that we ran out of water sooner that we thought. We reached the base village of Ambivali by noon or so, and began climbing the hill.
In another hour we reached the cave carved out of the rock and relaxed for a while, and started cooking lunch. Some of us explored the garrison fort, while others cooked food. Peth fort is located at a strategic location and control over this fort meant having an eye over entire valley. That explains the several battles fought between moughals and marathas.
We descended down around 6PM and headed back to Karjat station and took a train back to Mumbai.