That's the landing up past Mill Creek I think. Disgusting.
Landing is off Abernathy Creek road/E-4000, and a DNR pit near Sarah Creek (Abernathy trib).
That neighborhood gets hammered by dirties. Dirties with guns, dirties with ATVs, dirties with chainsaws. As the first significant patch of public land close to town, it gets desperately abused (much like Greenwater, since the 70 road is the first major access to the woods from town, and Sultan Basin, for the same reason).
I've yarded bags upon bags of garbage out of places like this...and it's repopulated the next weekend. It's really tough for law enforcement to cut paper on this sites, so the best bet is usually to just block them off. Dirties also tend to be lazy--it's no fun to carry your TV 1/2 mile by hand to shoot it.