Photo down the line appears to be from 1925.
http://historymatters.gmu.edu/d/6689/
... The “secret” society had 3 million members during its heyday in the early 1920s; roughly half its members lived in metropolitan areas, and although it enjoyed considerable support in the South, the Klan was strongest in the Midwest and Southwest...
About that time a Klansman ran for Gov. of Indiana as “The Klan” candidate. And won!