So DH and I will be in the US next week. I'm hoping to stock up on running shoes and Gu Chomps

Where do I find these things? Do I need to go to a specialty running store like I do over here?
FWIW we'll be in Oregon. Are there any locals here who can give us advice about good running stores/outlet centres? Towns/areas we'll be going through include: Portland, Columbia River Highway, Bend, Eugene, mid coastal region and Salem. We won't have much time, but if there are any outlet centres worth checking out along our route, we can probably spare a couple of hours, especially if the rumours I've heard about Oregon having no sales tax are true