Hello Sidney, Thank you for caring about the environment and for taking the initiative to make this report.
It is difficult to say for sure what the species is from a photo, but it appears to be poison hemlock. It has more highly dissected leaves - more carrot like. It get very tall as well. Giant Hog weed will grow a little later in the year. It looks a lot like Cow Parsnip, but blooms later than Cow Parsnip.
In addition to the link listed below under resources, here is a good site describing poison hemlock including identification and control methods.
https://kingcounty.gov/en/dept/dnrp/nature-recreation/environment-ecology-conservation/noxious-weeds/identification-control/poison-hemlock

Beth Thiel
May 11, 2026, 2:24 p.m.