As cities grow and populations encroach upon wildlands and recreation areas, we must do more than just pick up the litter and extinguish campfires. We must learn how to maintain the integrity and character of the outdoors for all living things. Leave No Trace is not simply a program for visiting the backcountry; it is an attitude and a way of life. Get your Awareness Certificate from Leave No Trace Trainers Harriett Lane and Sandi Adams. Adults.