Because this message bears repeating: Don’t. Move. Rocks!

Drive down any of the roads in a national forest or park that follow a river and you can probably spot a cairn — a stack of rocks balanced carefully on top of each other. The word comes from the Gaelic for “heap of stones” and many can be quite beautiful. Cairns can be good things when they are done right. Properly built cairns help mark trails to keep hikers from...

Learn More