I think you'll need to go a little further east. The closest would be either around the Quincy area, or Moses Lake. There are pheasants around Ellensburg, but almost all on private land. I would go to the Department of Fish & Wildlife land west of Moses Lake. This may be a bad year for wild birds but if so, they at least do release pheasants on the public land in that area, so you should be able to get into a few birds. Expect to have lots of company.