Possibly Angelica atropurpurea

Thanks! Stem shows no pigment, but it's been cool, and I think you are right. The plant reminded me of giant celery and they are even in the same family. I appreciate the ID.

To me it looks like Pastinaca sativa, Wild Parsnip.

Looks like Parsnip to me too.

I went back and took a picture of the plant in bloom. Does look like Wild Parsnip, Pastinaca sativa.

Thanks for all your help! Bob