Ed,
You are right: It's on the Swago River at Martha Pond. Here is what Parnes says about Calico Ridge in Paddling the Jersey Pines Barrens:
"The pond is an open area dotted with cedar- and bush-covered islands of assorted sizes. Pines and cedars crowd the shore. Because it is extremely shallow, one must pick one's way through underwater grasses. Following the right shore seems as good a route as any; it occasionally goes around an island that blocks the view, but otherwise the scenery is quite open. After the second island a canal that was once used to withdraw water from the pond can be seen on the left. The pond narrows and broadens several times as one canoes past more islands, and then it becomes very wide, and the islands turn into grass-covered sand bars. On the outside bend of a sharp right turn, there is a cleared area that leads up a sand "staircase" to Calico Ridge. It was formerly a state camp but now may be used as a rest stop in the event of a strong head wind. The water is still very shallow, and it contains many tree stumps as well as sand bars. The pond soon bears left, with the deepest water near the right shore. Muskrats and sandpipers can sometimes be seen, and numerous pitcher plants grow along the left shore. In a few minutes the pond ends as the river makes an abrupt right turn."