The morning sun lights up the brilliant yellow leaves of quaking aspen trees lining a hiking trail in Rocky Mountain National Park. Colorado.
Mountains of the Sangre de Cristo Range towering over the dunes at Great Sand Dunes National Park. Colorado.
A fly fisher (bottom right) at Dream Lake is dwarfed by Hallett Peak (top left) and the surrounding mountains in Rocky Mountain National Park. Colorado.
You can find just about every ecosystem at Great Sand Dunes National Parks — from the scrublands and the dune field to the forest meadows and the alpine tundra. Colorado.