If it's cold, cover the ashes in the pit with dirt, replace the sod, and naturalize the disturbed area. Aluminum foil and aluminum-lined packages won't burn in your fire. Compact it and put it in your trash bag. Cigarette butts, gum wrappers and orange peels are litter too. They can spoil a campsite.
Animals dig it up.
Try to pack out trash left by others. Pack and Saddle Stock Stock can seriously damage soil and vegetation if not properly cared for. Camp in areas with enough space to picket your stock away from trails, established campsites and water sources. Use light, compact equipment and food to reduce the number of pack stock needed. Forage is scarce at most campsites in the Southwest's back country.