Study Reveals Some Tall Sand Dunes in Colorado National Park Are Shrinking

Colorado Springs Pueblo, CO, October 8, 2026 — A long-term geological study has found that some of the towering sand dunes within Great Sand Dunes National Park and Preserve, located in Colorado’s San Luis Valley, are experiencing a decrease in height. The findings are based on a 30-year study conducted by geologist Andrew Valdez.

The research highlights a complex dynamic among the park’s sand formations. While some of the tallest dunes, referred to as ‘mega dunes,’ are reportedly shrinking, other dunes in close proximity are exhibiting growth. Star Dune, identified as one of these significant ‘mega dunes,’ has shown a notable drop in its measured height.

The study, which spanned three decades, observed changes in the sand dune landscape. Details regarding the precise measurements of height reduction or the specific reasons contributing to the observed shrinking or growth patterns were not provided. Similarly, the names of other dunes that are growing were not specified in the information available.

Great Sand Dunes National Park and Preserve is renowned for containing some of the tallest sand dunes in North America. The park’s unique environment is shaped by wind, sand, and moisture, creating a constantly evolving landscape. The findings from Andrew Valdez’s 30-year study add a new layer of understanding to the natural processes influencing these iconic geological features. The contractor’s name, beyond the principal geologist, was not provided. The fine amount was not provided. What happened next was not provided.

Story summarized from the original created by Seth Boster on gazette.com, see more information here.

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