So from LCS I can readily get to Cambridge Street, and I can essentially get to either Union or Washington and McGrath. In that direction, getting to Medford and Highland promises lots of suck going up McGrath. Getting further east (say, into Charlestown) seems tricky too, though I could conceivably cross the Gilmore Bridge (in traffic) and go across Main Street in Charlestown to Sullivan. That feels out-of-the-way, though, and if I'm putting up with that much traffic I might as well go through Union.

I do in fact have a bike map at home. I was thinking on the way in that a topographic map with contour lines would be useful. :-)