It veered away from the Fitchburg Line near Sherman Street in Cambridge and followed Fresh Pond along its eastern side before turning toward Watertown.
Cambridge has begun to contemplate its part in competing the Fresh Pond to Mount Auburn Street section.
It has also become a significant accidental urban wild corridor.
From there, it is quality design and implementation all the way to its meeting with the arsenal. It has an interesting and useful rules page that provides an indirect sense of conflict patterns.
One impressive innovation you'll find is the placement of etched system maps on granite posts at key entry points.