Tomorrow, Tuesday 17th, is the deadline to register to vote. It's too late to mail it in, but you can print this form, complete and sign it, and hand carry it to the Elections Office from 8:30 AM to 5 PM at 925 Portland Ave in Gladstone, which is about a five minute walk off either the 32 or 33 bus lines. Here's the FAQ on registration.
Voting systems are not perfect, so call the elections office at 503.655.8510 if you want to confirm you're registered.
And, if you're curious, here's the map for our ten districts and their precincts.