(adj) The Redwood Curtain (RC) is the extreme northwestern corner of California, i.e. the coastal counties of Del Norte, Humboldt, and Mendocino. The RC is the norcal
version of the Iron Curtain
in eastern Europe erected during the Cold War
and is mostly used in a derogatory sense, whereby the RC symbolizes the area's lack of cultural or metropolitan qualities as well as poor transportation access, sparse development, rugged geography, and a weird provincialism among the native locals.