All Iowa state parks and recreation areas are open for removal of certain types of plant life unless signs posted within the area state otherwise. Mushrooms, asparagus, nuts, fruits and berries are the only types of plant material that can be removed and harvested in state parks and recreation areas. Other types of plant life cannot be removed. Ginseng cannot be harvested in Iowa state parks or state preserves.

Removal or defacement of other types of natural features such as bird nests and rock formations is prohibited, as is removal or defacement of cultural features such as Native American artifacts and mounds.

Removal or defacement of other types of natural features such as bird nests and rock formations is prohibited, as is removal or defacement of cultural features such as Native American artifacts and mounds.