What grades does the University Of Washington use when determining admission?

While the cal states and UC system schools use 10th-11th grades when determining admission, what does the university of Washington use? Also do they use grades from year 12?

I think UW looks at your cumulative GPA and record from 9-11th grade. When I applied, my grades for 1st semester of senior year weren’t even close to being out yet.

Yup, they look at grades from 9-11th grade. They won’t look at grades from 12th grade at the time of admission but you’re still required to send an updated transcript later in the year.