Yep, Camassia.
http://garden.org/plants/searc...
Camassia angusta and Camassia scilloides are the two species that are (more or less) native in your part of the world, but Camassia leichtlinii is the species that is most often used as an ornamental. I'm not familiar enough with them to be able to tell you how to figure out which one it is.
