The Biggest Dune: Where Is It?

Where is the tallest sand dune in North America? A hint: it is the state with 58 fourteeners, mountains higher than 14,000 feet. The Great Sand Dunes National Park has a sandy peak 755 feet tall. Sue and I passed on the climb, which would have taken the better part of a day in the squishy surface. Star Dune is the name of the big pile of granules. Where is it? Colorado!
The Sangre de Cristo Mountains rise behind the great sand dunes range.