Drive

Save your maps before travel OFFLINE MAPS

OFFLINE: Google Maps 5.7 for Android introduces "Download Map Area" Beta http://goo.gl/fb/J71n

Now you could save your maps before going to travel to an area which did not have good coverage.

Open maps app. Click on Menu > More > Labs 




The bock is the area where all the maps will be saved locally.

Saving maps
You need to download maps 5.7