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Q&A How can I distinguish between rock pile types cairn, duck, and natural?

I've seen cairns while hiking in mountains and they are usually easy to distinguish from natural rock piles. However, I am a bit confused by what makes a duck and what distinguishes it from a cair...

1 answer  ·  posted 6y ago by wanderweeer‭  ·  last activity 6y ago by System‭

Question hiking trails