Looking to visit this park from the US side, do I need to bring my passport or ID? I have been to this park many times before COVID on the US side with no ID but want to know if they are checking ID or not if you stay on the US side. Let me know!

If you are staying on the US side and are a US citizen you won't need any ID

You may want to bring a driver's license at a minimum incase you mis the turn for the peace arch. In actuality you don't need an id for the park.

Since things are a bit more stringent at the park, I wouldn't take any chances, I'd bring your passport just in case. I have had some American friends get stopped before they left the park and had all their passports checked.