Fellows:
Professional writers who have made a significant contribution to the conservation of land, wilderness, and the natural world as evidenced by the wide publication of books, articles, stories, writings, or cartoons in established media (including electronic media) over a long period of time.
Associate:
Associate membership is open to writers who either have not had many articles, books, stories, cartoons and other writings published in established media or have been writing on conservation for only a short time.
Academic:
Academic membership is open to university and government scientists, professors, and students who have written in the fields of land conservation, wilderness or the natural world.