In my opinion, there are two factors which will play heavily into this decision: (1) whether your target market is Seattle/Portland/Boise vs. another city, and (2) how deep your pre-law school ties are to that market. So, I'll address my thoughts based on those factors. Also, this will be a bit one-size-fits-all, and others might disagree for very specific circumstances.
I want Seattle, Portland, or (to a lesser extent) Boise
No pre-law ties: Scary proposition here in my opinion. You're simply not guaranteed to work here in this scenario. You could go to a T13, go to UW and finish good but not outstanding, or go to a local school in the specific market you want...and still strike out, at least initially. You can get beat out by people at very local schools, who perhaps worked at "midsize firm X" before law school, and could only get into Seattle or L&C or U-Oregon. And since you want a larger city with no ties, I'm guessing you're more into the biglaw than someone in another scenario I'd describe. If that's the case, I'd take a T13 over a local school (Stanford/Berkeley would be nice), work like hell to develop ties during 1L summer, but be fully prepared to work somewhere else if you're looking for the larger firm life, and don't limit yourself when OCI comes around.
Deep pre-law ties: This is a pretty good situation to be in, and where I would actually take T13 (esp. Stan/Berk) > UW >>> others (cost dependent, of course). This was me. When I say deep ties, I mean, "my fiancee works at at [hospital in Seattle] and this is the only place I want to practice law," "I've lived here for 18 years and am keeping my house near the Willamette...which I'll be moving back into after I finish at Michigan," etc. These kinds of ties, combined with a T13, protects against the overall strike out, while also keeping you feeling like a local. Also: you shall do your 1L summer in said market. You shall network during that summer, without seeming thirsty (be someone people want to work with/be around). You shall begin the job hunt in mid-July of your 1L summer while you're there, and not wait for the standard timelines. I say shall,
I want Spokane, Idaho Falls, Helena, Missoula, other small city
No pre-law ties: I don't see this being the case for more than 1 in 100 people targeting these markets. But HelloYesThisIsDog is pretty much spot on. I'd take Idaho for Idaho, Montana for Montana, etc. Probably take UW for smaller Wash/Ore. He's right about Gonzaga & Spokane, and the pay, and the unlikelihood of anything resembling biglaw. And that'll hold for most of the other cities as well. Boise is a weird netherworld that can feel a little like the bigger city for a few firms, but also has a ton of U-Idaho (and now some Concordia) types filling up those same firms, and nearly all the smaller firms. You'll get some crossover, where Idaho grad wants Spokane, Gonzaga in Boise, both in Coeur d'Alene, etc. But just realize that there are very few jobs in cities that are not the three listed above. Not biglaw jobs, just jobs period. And they're very insular, like Dog said. An 8-person shop that does insurance defense will almost all have gone to schools in the region, and would be very unlikely to randomly hire a Cornell or NU grad, unless it was one of their sons/daughters/nephews/nieces.
Deep pre-law ties: Not much changes from the above, except that you could venture out to UW or Berk or maybe another T13 if you wanted (for options), and still maybe get back to Idaho Falls or Missoula, for example.
But what if I have decent-but-not-great ties? Well, you're rolling the bones in between the above. You are the anecdote of your own life, so YMMV in a big way in these types of scenarios. Realize that the cost-benefit analysis will still apply, and that opening up other markets may be important, even if you don't know it now (this was me, who was "dead set" on my current market, yet after my clerkship will be heading back to T13 market biglaw for various reasons that all hit at once during 3L). There's nothing wrong with being all-in on a market outwardly, while absolutely making sure you've got backup plans in place. You don't have to be Cortez and burn the damn ships. It's not very prudent in our profession!
Happy to bat it around with any follow-ups. And I'll also zap some PMs on some specifics in my market, and what I've seen for firm cutoffs, who's getting SSC clerkships, the bigger law jobs, etc. (and in what numbers) over the course of the last few years based on my anecdata.