Immigrant?

I mentioned last week that I was having trouble identifying one of the two kinds of pink flowers I saw while out at Esquimalt Lagoon last week. Here is the mystery pink flower. Although I think I have identified it, I could well be mistaken since there are hundreds of species of Allium and the flower pictured above appears to be a little out of its normal geographic location (eastern Washington and Oregon). I believe this is is Allium douglasii, or Douglas' Wild Onion. If not, it must be a close relative - you can check the photos HERE and HERE of virtually identical flowers identified as Douglas' Onion or Douglas Wild Onion.