The
Great Sand Dunes National Park
The Great Sand Dunes of Colorado are seeming
totally out of place at the edge of the snow-covered Rocky
Mountains, these dunes of pure golden sand cover an area
about 7 by 5 miles and reach heights of 700 feet above the
floor of the flat San Luis Valley, making them the tallest
dunes in the USA.
Great
Sand Dunes National Monument became Great Sand Dunes National
Park and Preserve on September 13, 2004, when Secretary
of the Interior Gale Norton signed a declaration making
this America's 58th National Park.

Visitors can hike the dunes and several nature trails, observe
plants and animals and camp at either a campground near
the dunes or in the backcountry. Medano Creek, which flows
at the base of the dunes during spring and early summer,
allows for sand castle building, fishing and hiking.
The
dunes are the product of the wind and rain eroding the San
Juan and Sangre de Cristo Mountains that ring the San Luis
Valley. They have collected here because the prevailing
winds across the valley blow in this direction and meet
winds blowing in the opposite direction. The sand drops
to the valley floor and is held in place by water flowing
from the Sangre de Cristo's. So over the course of millenia,
the dunes have built up to where they are today. And tomorrow
they will be different because the wind still blows, the
sand still moves and the deposits of sand still grow.

The
Great Sand Dunes National Park photo gallery |