Korigad hill fort is about 20kms from Lonavala near Amby valley. It is a one-day treak and you can come year any time of the year. The view from the top is just splendid and, on your way, up you will see 2 lakes, Temple of Goddess Korai Devi, Six Bombard Cannons, which were used during early ages in wars and also the walls of the fort are still intact. The Korigad fort trek is a easy trek and can be done anybody as it takes only an hour to reach the top from Peth Shahpur base village. You can halt on your way and click beautiful pictures of the surrounding.