Located in Maharashtra, the base village of the Ganpati Gadad trek is Sonavale (Sonagaon). You can reach this location via public transport and a private vehicle.
Public transport:
Coming from Mumbai, you must take a train from Dadar/CST & get down at Kalyan station. From Kalyan ST Depot, you can take a local bus heading towards Murbad. Then take another local bus from Murbad to Dhasai.
You can hire a local rickshaw or another bus (the frequency of the local buses is significantly less) to the base village from Dhasai.
The entire journey will cost you about INR 200-350 depending on the mode of transport you opt for.
Private Vehicle:
Distance from Mumbai is around 110 kms & will take approximately 2-2.5 hours to reach. You can either take the EEH and go from Airoli moving towards Navi Mumbai or go via Thane. Get Directions.
Distance from Pune is 160-170 kms and can take 3-4 hours to reach.
(It is advisable to travel with a trekking group, as travelling to this base village via public transport is a bit more complicated than usual.)