Unlike the rest of Bowdoin Park, Mapleknoll Marsh, which is tucked into its northeastern corner, seems to be largely–if not entirely–unmaintained. The boardwalk is sound but fraying, and tall reeds encroach upon it and even grow up through the boards. Very few visitors seem to find it, though I did encounter a birdwatcher recently, and on another occasion a young couple shrieking with delight as they teased a frog with a dried reed. (The frog, apparently thinking the movement of the reed indicated food, kept jumping and trying to bite it)