Washington County, Oregon Events Event(s) for Thursday, April 30, 2015 Date Event Category 4/30/2015 Hillsboro Chamber Day at the Capitol Chamber Programs The indicates on-line registration is available for this event. Enter your email address and "check" the box for each event that interests you. You will automatically receive an email reminder before the event! Your Email Address Remind me 1 2 3 4 5 day(s) prior to the event date.