Medallion trees are trees that are marked with silver dollar-sized metal disks. Some are coppery or brassy, while others look to be made from stainless steel or aluminum. Each carries a historical event that took place the same year that the tree was likely germinated. Many also number the tree. I’ve seen numbers as high
No one knows who began marking the Medallion trees. Sources suggest that the effort began in the last 1920s, and that perhaps Civilian Conservation Corps workers might have started it. Whoever it was drilled core samples into some of the largest trees in the Sandias and counted the rings before they fabricated the medallions, then hiked back to install the disks over the core sample holes. It was definitely a labor of love.