Boston is a great walking city, but like a lot of walking cities, it's not really a dog city. It's not that people in Boston aren't dog people. It's just that there are too many cars and too many buildings. Places where property values are high generally don't put an emphasis on green space. So, dog parents have to be prepared to travel for their puppies.
Fortunately, for dogs in Boston and their people, there's a great dog park just outside of city limits, in the town of Arlington, Massachusetts. Arlington was founded less than ten years after Boston, so there is a lot of history to the town, and a lot of historical reference points to see. If you're into history, of if you just like quaint, leafy New England towns, Arlington is a really nice place to visit. History aside, though, if you have your dog with you, you really must go to Thorndike Field Dog Park.
Thorndike Field Dog Park looks like a Currier and Ives print of a New England dog park. It's a spacious dog park, with lots of trees and benches. The middle of the park has a large, very old oak tree that is surrounded by a wooden fence. The park has agility equipment for your dog, including a wooden ramp, a concrete set of stairs, and a couple of large tunnels. There is a small dog enclosure that also has a small tunnel, for the little dogs.
Thorndike Field Dog Park has multiple water fountains for people and puppies alike. The fountains are turned off during the winter, but when the temperature is above freezing, local volunteers and city park workers will bring bowls of fresh water. There are plenty of poop bags and trash cans. Rather than grass, the park uses what it calls gravel and what others might call "coarse sand" for the dog park. It helps to give the dogs traction in icy conditions, so they can really run and work off their energy.