However, North America's tallest freestanding single-structured sand dune isn't in Colorado; it's in Idaho. Nestled within Bruneau Dunes State Park, a 470-foot sand peak rises dramatically above ...
Known as a summertime staple, Silver Lake Sand Dunes is open for winter hiking, fat-tire biking, snowshoeing and sledding.
A unique combination of sand and snow transformed a Colorado national park into an otherworldly winter wonderland, a stunning photo shows. The phenomenon occurs about once a week in Great Sand Dunes ...