[2] He recalled: I designed the Cascadian flag, aka the Doug, way back in the mid-1990s when I was a graduate student studying in Eastern Europe.

Prior to the design and its popularity, the idea of Cascadia–specifically the bioregion–was pretty much an abstract concept reserved for radical geographers and hip sociologists.

[5] The flag is a tricolor consisting of three horizontal stripes of blue, white, and green, charged with a single Douglas fir tree in the center.

The tree symbolizes "endurance, defiance and resilience against fire, flood, catastrophic change, and ever increasingly against the anthropocentric man".

In 2014, Kelton Sears of Vice said the flag "has quickly become the dominant symbol of the nascent Cascadian identity", appearing on microbreweries' beer labels and at local events, including Portland Timbers games, gay pride parades, environmental protests, and activities affiliated with the Occupy movement.