This one is blooming now and I don't know the name of it.
It is about 15 ft. tall and over 20 ft. wide. I got it in a trade years ago.
The smaller leaves are from a Pieris that sprouted in an old stump.
Even for this somewhat moribund forum I'm surprised you haven't gotten a response yet.
I'd guess it's probably one of the R. auriculatum hybrids, such as 'Aladdin', discussed in the 4th paragraph here:
Here is a link that might be useful: http://www.rosebay.org/chapterweb/spec_aur.htm
I meant to say Aladdin was another possible hybrid not mentioned on that page. I think it's actually more common in the PNW than several of the ones listed, as I've seen it in Greer's catalog several times.
Here is a link that might be useful: http://vancouver.ca/parks/parks/stanley/pdf/50Rhododendrons.pdf
I noticed it, very pretty as are all his plantings I suspect :)
I didn't comment yet, hadn't wanted to bump it down out of the way before others could view....
And I don't know what it is, but thanks for sharing the photo.