We slipped down that slope long ago; stacking stones even as trail markers (“cairns”) is frequently prohibited in designated wilderness areas. Eg. > Do not bu

We slipped down that slope long ago; stacking stones even as trail markers (“cairns”) is frequently prohibited in designated wilderness areas. Eg. > Do not build rock cairns or other trail markers https://www.nps.gov/seki/planyourvisit/minimum-impact-restrictions.htm https://www.nps.gov/seki/planyourvisit/minimum-impact-restri...