Sand Dunes
Great Sand Dunes National Park and Preserve in Colorado. Behind the dunes are the Sangre de Cristo mountains - the southernmost subrange of the Rocky Mountains.
Bob hiking up one of the smaller sand dunes at Great Sand Dunes National Park
Great Sand Dunes are the tallest dunes in North America
Great Sand Dunes National Park, Colorado
Dune hiking - great exercise!
Black and White of the Great Sand Dunes and the Sangre de Cristo Mountains
Mesquite Flat Sand Dunes in Death Valley National Park
Mesquite Flat Sand Dunes, Death Valley National Park
Roadrunner Tracks - Mesquite Flat Sand Dunes, Death Valley
Mesquite Flat Sand Dunes with the Grapevine Mountain Range in the background. Death Valley National Park