Regarding business schools in the UC’s, UC Irvine offers an undergraduate degree in business in its business school… UC San Diego offers a minor in business. Alternatively, you can also major in business/management economics at other UC’s such as UCLA, UC Santa Barbara, UC Santa Cruz or UC Davis in their economics departments. This is in addition to the previous mentioned undergraduate business schools at UC Berkeley (Haas) and UC Riverside.
You mentioned Washington. The University of Washington in Seattle has the Foster School of Business, which is very highly regarded and competitive to get admitted into. Keep in mind that you will pay out of state tuition, which is about 33K per year. Seattle is home to many great businesses, i.e., Microsoft, Amazon, Starbucks, etc.
If you are willing to pay out of state tuition, you might want to consider USC’s Marshall School of Business. It also is very highly regarded and competitive to get into. In addition, you would have great connections with the business world in Los Angeles.