I'm going to take a virology course in college, so I'll have a more solid plan after I understand just how a zombie virus would work.
Honestly, it depends on the type of zombie/zombie virus. If we're talking Romero's slow walking zombies, I'd probably stay in my home town and just barricade myself in the local Walmart. I'd probably even be able to walk about town.
28 Days Later/Dawn of the Dead 2.0 zombie? I'd travel about an hour out of town and just start walking in the forest. We have a large amount of small towns in Oregon. They're in the woods and most are off the beaten path. It wouldn't be hard to get lost out here. Heck, we barely see people now.
It also depends on if the zombies can hunt you down (like the Dawn of the Dead zombies). I live about twenty minutes from a working bay. Push comes to shove, I can just commandeer a boat and sail off towards less populated regions (Alaska, for one).
Left 4 Dead zombies? Alaska/Canada. The Canadians are immune to the zombie outbreak. This is fact.