Rajmachi Fort lies somewhere in the mid of Mumbai Pune route. Mumbai and Pune are well connected to major Indian cities via railways and roadways.
From Mumbai, one can catch a train going towards Pune and get down at Karjat. From Shree Ram Bridge, Karjat catch a shared Auto (Tum –Tum) (INR40) to reach Kondhane village. You can start the trek from this village. On the way, you can also see the beautiful Kondhane Caves.
Note: This is the longer route to reach Rajmachi and trek can take easily around 3-4 hours (one way), but the views all along the way are breathtaking.