Originally Posted by knoxg
When you get to Portland, ME get to a bike store and hope they carry the Rubel Maps.
http://www.bikemaps.com/. You'd likely be fine with just the Western MA one, but might want the Boston city one as well as it can be tricky coming into town.
the Boston city map seems to have been last updated in 1999... seems a bit out of date... I'll drop 'em an email