How rigorous should senior year course load be for WashU applicants?

WashU generally wants to see that senior year stays academically strong, not that you max out every possible hard class. A lighter schedule can hurt if it looks like you are backing off after building a rigorous transcript, but it usually is not a problem if your courses still make sense for your school and continue to challenge you. Admissions reads senior year in context, including what your high school offers and how demanding your earlier years have been.

For WashU, course rigor is one of the most important parts of the academic review, so senior year still matters even after three strong years.

What tends to look best is a schedule that is both rigorous and credible. For example, if you have already taken advanced math, science, English, and social science classes, then keeping some at the highest level available is typically viewed well. Dropping from a very challenging junior year to a noticeably easier senior year without a clear reason can raise questions.

A lighter senior year is easier to explain if there is a real academic rationale, such as finishing the highest level offered in a subject, making room for a meaningful elective connected to your goals, or balancing a major outside commitment. In practice, WashU is less focused on whether your schedule is the absolute hardest possible and more focused on whether it shows continued intellectual engagement.