My very simple, condensed answer about foraging is: as long as you are picking small amounts of non-endangered species for personal use, it’s most likely going to be fine. (i.e. picking a few berries or mushrooms while you’re hiking) Regulations depend on what you want to pick, where you’re picking it and how much you want to pick. Small amounts for personal use are usually okay, but check to know how much “personal use” is. Here are some sites that might help:
- BLM “special forest products” regulations
- State Department of Fish & Wildlife special forest products regulations
- Willamette National Forest special forest products
I hope all the red tape doesn’t discourage you; every forest ranger I’ve ever met wants nothing more than to see people out enjoying the forest, and the Sweet Home ranger district even leads hikes where they teach people how to forage!