By Bike=
Take a car or a taxi from Mumbai. Alibag is on the way to Goa from Mumbai, so you could do the trip as part of a trip down south to Goa. To reach Alibag from Mumbai, take the Mumbai-Goa-Ernakulam National Highway NH17. At Wadkhal 'naka'crossing, which is a little 8 km ahead of Pen, continue straight the left turn keeps you on the highway to Goa, and you are now on the road to Alibag! Alibag is about 22 km from that point!
From Pune, take the Mumbai-Pune Expressway and take the Khopoli exit. From there drive towards Pen 30 km, then cross Mumbai-Goa highway to proceed towards Alibag.
