Drawing of the side view and top view of a cairn entitled 'Cairns'.

The image of the side view:

• The height of the cairn is shown with arrows and labeled '900 mm (35 in)', and the width is shown with arrows and labeled '750 mm (30 in) min.'
• An arrow pointing to a small rock with the label 'Do not use small stones wedged in cracks for structural support.'
• Other text included is:
  • 'Use flat stones and overlap the joints.'
  • 'Slope stones inward.'
  • 'Use large stones to build the base.'

The image of the top view:

• Two arrows pointing to the outside of a stone showing how the top stones cover those cracks is labeled 'Overlap all joints.'
• The text 'Pack the center with rubble.' is also included.
• An image of two stones piled resembling the shape of a duck is labeled 'Rock Duck'.

Other text included: 'Illustrations courtesy of the Appalachian Mountain Club's Trail Adopter Handbook.'