This 211 acre pond is over 90 feet deep in several places and is about one and one half miles long. The shore line is moderately built out but fortunately not very densely. Long Pond is mesotrophic (it contains moderate quantities of nutrients and is moderately productive for aquatic animal and plant life).

The state boat ramp makes it one of the more heavily used ponds in Plymouth. Fishing is good. Sailboat races take place every summer weekend.

Unfortunately there is significant degradation from stormwater runoff shunted to the pond from the relatively dense 200 house Plymouth Estates residential development to the north.