Environmental
Clean Up the River Environment, Freshwater Society, Izaak Walton League, Minnesota Division, ME3's Sustainable Minnesota, Minnesota Conservation Corps, Minnesota Ducks Unlimited, Minnesota Public Interest Research Group, Redwood-Cottonwood Rivers Control Area, The Nature Conservancy of Minnesota
Minnesota Archaeological Society
Nonprofit organization welcomes both avocational and professional archaeologists. Events calendar, meetings (often associated with an activity), photos, membership information.
Upper Midwest Rock Art Research Association
Publicizing petroglyph and pictograph research in the Upper Midwest.