What are the best dog parks in the Boston area?

Summer’s here and the time is right for longer-than-normal forays with Fido.

But where to go besides the sidewalk and the backyard?

Our latest Friday Open Thread seeks to answer that question: What is the best dog park in the Boston area? Or, if you prefer, what are the best dog parks (plural)?

Are they ones with particularly spacious digs? Or perhaps there’s one of those doggie fountains? And some spots are just more convenient than others, aren’t they?

Let us know your favorite(s) in the comments section below. Details appreciated.