Much of "foraging" can be contrary to the principles of "leave no trace." We need to be careful not to damage rare plants or animals, to leave enough for the animals that may depend on the items (such as berries), and not to disturb the vegetation. Cutting green wood is always a no-no, especially in national park or national forest jurisdictions.

In many places, such activities as mushroom picking and berry picking are regulated. Small amounts for immediate consumption are usually OK. Larger amounts are not. Of course, fishing and hunting are regulated by the states, limited to certain seasons and amounts, and licenses (usually very expensive for nonresidents) are required.

Of course, this time of year many of us "graze" our way along the trail when the huckleberries are ripe! Being careful, of course, that the berry or two we snatch in passing is high up enough to be out of the "reach" of passing dogs!