Originally Posted by proto something or other
I believe it also may be a dog park area.
Yes, some of it is, according to this map: http://metrokc.gov/parks/images/marymoormap.gif
But by my count, there's over 100 acres of empty land down there. Still, the swamp factor is a concern; also, it looks like there's an "interpretive trail" marked on the map, so it could be protected wildlife habitat.