Oregon seems to have its projected peak hospitalization date [5/5] well after that of Washington [4/11].
Neighboring States in the East have very similar dates.
At this time daily data is showing signs of decreasing new cases. Too early to know if this is a trend or just a blip. There could still be a second wave of new cases.
As of yesterday morning, though, in Oregon there were 768 positive tests with 167 people ever hospitalized, with 19 deaths. Oregon has 291 adult ICU bed available and 762 available ventilators. There are currently 38 COVID-19 patients on ventilators.
These figures come from the state heath authority web site.
Where did you find those peak predictions for oregon and Washington?