The Great Sand Dunes National Park has to be one of the most unusual parks to visit. It is far from large cities and accessibility can be challenging. There is a visitor center on-site with bathrooms, and there are limited motels/hotels near the park and some campgrounds in and around the park. We drove from the Denver area to the park in about 4 hours and after visiting the Great Sand Dunes National Park we stayed the night in a hotel in the town of Alamosa, around 38 miles away.
The visitors center for the park is at 8,200 feet elevation at the base of the dunes, so not only do you have to prepare for the elevation, but the fact that weather in the park can be very variable. There are often high winds in spring, and March and April are the snowiest months. In summer, the air temperature can reach 80 degrees F, while the temperature of the sand on the dunes can reach 150 degrees F. In summer after the sun goes down, the air temperature can drop to 40 degrees F.
But don't let these challenges defray you from planning a visit to the park. Probably late spring or early fall are the optimal times to come, and if you come in summer plan on an early morning visit before the heat of the day. You can check the park's weather on this link.

The Medano Creek that runs in front of the dunes is only seen in early to late spring, as it is the result of snowmelt in the mountains. Our visit was at the end of April, so the creek was still shallow enough for us to walk across with our shoes on, but it increases in-depth as the season goes on and children often delight in swimming and playing in it.
I ended my Part One post with our reaching Medano Creek, and now I'll take you forward as we approach the dunes.
It was interesting to see the different qualities of the sand as we walked toward the dunes. The sand close to the creek was full of rocks and pebbles.
A close-up
This sand is made up mainly from the close to the Sangre de Cristo Mountains, and therefore between the wind and water, larger particles of sand and pebbles accumulate.
The closer you walk to the dunes the sand becomes fine-grained and very deep and soft. You can see how people's footprints sink into the sand.
Most of the 30 miles of sand dune field are made up of sand originating from the far westerly San Juan Mountains. From there it was washed by streams into the vast San Luis Valley. From there southwesterly winds blew, bounced, and pushed the grains up against the Sangre de Christo Mountains, where they formed the tallest sand dune formations in North America!
I was excited to begin our hike! Here the dunes are ahead...
....and from the same point is my husband with Medano Creek behind him.
In the distance, you can see the tops of the 14,000-foot the San Juan Mountains in the distance to the left, and the vast sand dune field all around us.
People in the foreground look like tiny specks on the sand.
As we climb in elevation the challenge of walking on the dunes becomes more and more apparent to us.
There are many hills and crests to conquer and we begin to feel defeated by both the soft sand grabbing at our ankles like quicksand, and the constant wind whipping around us
The elevation of the dunes seemed never-ending.
I would catch glimpses of people reaching the top, which would spur me on...
But my husband and I were beginning to realize we probably would not be able to reach the zenith of the top dunes, as we were struggling with fatigue.
At that point, we stopped and just took in the beauty of the height we reached.
We looked in all directions and felt exalted by this wonder of nature!
Mountains were all around us, both far and near.
So, how far did we hike? If you enlarge the photo above you can see I marked the dune we stopped on with an "x" It took us about an hour and a half to reach this point.
Here I am at that point--my face is red from the intense sun, wind, and exertion of walking in soft sand. Below is a video I posted on my Mille Fiori Favoriti Facebook page from that place on the dunes. Click here to go to the Facebook page if you do not see the video plugin below.
As you can hear in the video, the wind was strong on the day of our visit and it was one of the factors that inhibited our hike. I was worried about sand blowing into my eyes and lungs. I think I'd be better prepared if I return again by wearing more wrap-around sunglasses and bringing a face mask and tie on sun hat. Although the park claims it is less windy than the city of Chicago, Spring is often the windy season.
Still, I was thrilled that we made it as far on our hike as we did and that I enjoyed these magnificent sights!
It felt like we were in another world, and seeing sights I never dreamed I would see!
On our way back toward the bottom of the dunes, we stopped for a few minutes to watch both children and adults use special sandboards to ride down the dunes, both sledding and sandboarding.
Sitting on the board to ride down a dune looked like fun! The special boards have to be rented or bought at nearby retailers--they are NOT available in the park. Click here to read about rentals.
I took one last look at where I had hoped to hike, as I knew that the entire dune field could be seen from the very top of the highest dunes. Maybe on my next visit, I'll be able to get there.
We were still very happy to have accomplished what we did and enjoy our first visit to The Great Sand Dune National Park and Preserve. They are ever-changing, but always staying the same, totally unique and unexpected.
After our overnight stay in Alamosa, we journeyed east towards the vast plains of Colorado, where we wanted to visit two more National Historic sites. More about those interesting and poignant places in a future post!