People simply started writing. You can start with Ernest Callenbach's Ecotopia. That's a favorite among people who self-identify as Cascadian. It's a bit dated, I think, and most of the ideas in there many would reject. Then in the 90's David McCloskey gave the idea some academic legitimacy.
http://paulenelson.com/2013/11/17/david-mccloskey-on-cascadi.../ A few flags were designed, and I think most people have agreed on this one:
http://upload.wikimedia.org/wikipedia/commons/a/ae/Flag_of_C... Nowadays the idea has entered the arena of sports, particularly soccer:
http://www.thecascadiacup.com/ In our case, 'raising awareness' was really just publishing zines, running an info booth at events, being politically active or at least present at (usually) leftist protests and having meetings. I wonder if there is an enclave of Front Range thinkers whom I should get in contact with...