What is with this East/West split for Clinton/Sanders?
Even the one county Sanders one in the Eastern part of the state was by less than one point and then there's a county in the center of the state where the split the vote 50/50.
I'm pretty sure, the west is more libertarian (like the Mountain West), whereas the east is more conservative (like the Midwest), which redounded to Clinton's favor, whose voters were more religious than Sanders'.
You can observe the same effect on the Republican site:
The antichrist performed much better in the less religious west than in the religious east.