Sorry to say but MA is abysmal at this. Bike paths are few and far between. A few examples are "The Upper Charles River Path". It's supposed to be a 26 mile loop through Ashland, Sherborn, Holliston, Milford, and Hopkinton. It's been in the works for 9 years and all that is done is 2.5 miles of the Milford's 6 mile section. The rest of the towns have not even started due to either politics or funding. The Minuteman Trail from Bedford to Arlington was supposed to connect the the Charles River Trail that goes from Watertown to Cambridge. However, Belmont does not want a trail through their town. I could go on but won't. This state is plagued by politics and funding with everything from education to bike paths.