Both of the bucks I have shot the last two years in ellensburg (teanaway) have been as pure mule deer as I've ever seen. And I've hunted goldendale my whole life and it seems the farther west you go the more blacktail characteristics they have, but even east of 97 the deer still have blacktail in them. All three bucks my family killed in down there this year had mule deer type racks, but broad black tails. But who knows, mostly anywhere in central washington there is going to be some form of mixing I think.