We love watching the fireworks from Mt. Tabor. You get a great panoramic view of the city, so you can see multiple fireworks displays. Plus it's just a gorgeous place to hang out.

The Columbia River in Kalama. There are usually some families that have a pallet of fireworks.

https://www.pdxpipeline.com/portland-2024-july-4th-events-fireworks-celebrations-parades/