« All Events This event has passed. Youth Retreat at Lake Washington High School October 9, 2021 @ 12:30 pm - 3:30 pm « Philharmonia Retreat at Lake Washington High School BSD: No School » + Google Calendar+ Add to iCalendar Details Date: October 9, 2021 Time: 12:30 pm - 3:30 pm Event Category: Youth Symphony Related Events Spring Rehearsal #2 April 1 Spring Rehearsal #3 April 15 Spring Mini Retreat (Premiere, Sinfonia, Flute Choir, Flute Orchestra, Percussion, Philharmonia & Youth) April 20