Oregon Blue Iris/Iris tenax

Iris tenax is a species of Iris, known by the common names tough-leaved iris, Oregon iris, or more colloquially, flag.

It is native to southwestern Washington, western Oregon, and northwestern California. It occurs along roadsides and in grasslands and forest openings at low to middle elevations. The subspecies Iris tenax ssp. klamathensis is endemic to northern California in the Klamath Mountains. From Wikipedia