@GarethMcCaughan OREGON? (a state (def), I've reached = ERGO? (turned = anagram) +ON) ...ergo = therefore = reached is a bit of a stretch though...

@Alconja no, not OREGON.

I'm about to be AFK for several hours. I will confess that one word in my CCCC clue is kinda redundant and is there only to improve the wording. I say this not so much because I think that info is needed to solve it, but because it may make it easier to know when you have solved it if I'm not around :-).