If you are traveling to Nagaon from Mumbai you have the option of traveling by the ferry. Ferries are available from Gate way of India round the year but for monsoons.
Best Route from Kolhapur to Nagaon
Kolhapur - Umbraj - Patan - Chiplun - Khed - Mangaon - Vadkal - Poinad - (Alibaug - Murud Rd) - Nagaon
Best Route from Pune to Nagaon
Pune - Mumbai - Express way - Lonavala - Khopoli - Pen - (Alibaug - Murud Rd) - Nagaon
Best Route from Mumbai to Nagaon
Mumbai - Panvel - Pen - (Alibaug - Murud Rd) - Nagaon (110 kms)
If you are traveling via Lonavala try the chikki and berries. Lonavala is also famaous for the 'misal pav' the very own maharashtrian snack!
Distance from Major cities..
Mandwa jetty is where the ferries alight. There are A/C and non A/C ferries and they also have bus service from Mandwa to Alibaug bus depot Nagaon is approx 7 Kms from Alibaug