Mount Rainier High School - School District Calendar - Highline School District - 2026-2027

This Highline School District instructional academic school calendar is extremely important as it keeps you informed of Mount Rainier High School grading periods, early dismissal dates, staff development days and holidays for the Mount Rainier High School calendar school year 2026-2027. As a parent and or student, you will find yourself needing this information on a regular basis, so please "like" and bookmark this page in a visible location within your favorite browser. The legend for this Highline School District 2026-2027 calendar is at the bottom of the page. If you are browsing on your PC there is another copy of the legend in the right hand column.