Sand Dunes Swimming Pool & RV Park - Hot Springs in Colorado


It doesn't end with the traditional hot spring pools that are common in the countryside.

Think you've been tricked, and pay the extra fee to sneak into the vinyl house in the back.

Great Sand Dunes National Park

Newly established in 2004, the newest national park in the United States is the highest elevation sand dune in North America.

mt herard from dunefield

Christian Collins - mt herard from dunefield (2017) CC BY-SA 2.0

The dunes formed in this region, which is not particularly arid, because the strong westerly winds coming over the Rocky Mountains carry sand that collides with another mountain range.

Great Sand Dunes

The area overlooking the dunes has an abundance of hot springs.

The Colorado Gators Reptile Park, a facility that uses the thermal water, is also located nearby.

Regular pool for kids

General Entrance 2

Sand Dunes Swimming Pool & RV Park is, as the name implies, an RV park/campground with hot springs.

Use of the pools for overnight guests is not free, but half the normal price.

General Entrance 1

Since it was a walk-in this time, I paid the $15.00 adult fee (as of this writing) to enter.

There I found a somewhat nostalgic scene.

Swimming Pool 2

Facing the huge Main Pool was a covered area.

On the side of the main pool was the Baby Pool, and on the other side was the Therapy Pool.

Baby Pool

The water temp in the Main Pool was 100 degrees F and the therapy pool was 106 degrees F.

On the other hand, the temperature at the source appears to be 118 degrees F.

Swimming Pool 1

There was a water slide, which kids may enjoy.

Water Slide

Greenhouse for adults

Here is where the fun begins.

Once I have completely exited, I went around to the back of the facility.

Greenhouse Outdoor 1
This polytunnel is it!
Are you kidding?

A greenhouse that once grew vegetables served at the restaurant has been renovated and turned into an adults-only spa facility.

Greenhouse Entrance 2

There was an age limit of 21+ and a $5.00 surcharge.

Greenhouse Entrance 1

To the right, just inside the door, was a row of golf simulators.

Indoor Golf

Proceeding to the left, the interior of the plastic house was finally revealed.

The first thing that caught my eye was the "coffin" near the entrance.

Hotter Pool 2

The pool was shaped like a coffin, and 111 degrees F water was poured into it.

Suppressing my impatience, I first paid the fee.

Box Bar

This cool bar was the reception desk, which also serves alcoholic beverages and food.

Alcoholic beverages are limited to three drinks per person, as drinking and getting warm can make you dizzy.

Center Pool 2

The Zero Entry Pool bisects the vast interior.

Center Pool 1

It was long and narrow, gradually deepening as one went deeper.

An untouched area remained at the far end of the greenhouse, which was undergoing renovation.


Walking along the boardwalk surrounded by tropical plants, I felt as if I were strolling through a botanical garden.

Botanical Garden

I found a sauna hidden in the bushes.

The interior was sized to accommodate about 10 people.


Including the Coffin Tub mentioned earlier, there were a total of three small pools.

This Deep Thought Tub had a temperature of 108 degrees F.

Foaming 01

It seemed that natural thermal water was indeed fed from the water outlet.

However, all the pools had a faint or obvious odor of chlorinated chemicals.

Foaming 02

It might be that there happened to be detergent left over after cleaning, but this foaming may well raise a question.

While the originality of the space was wonderful, the water quality was unsatisfactory to me.

Water Discharge

Drainage was done through ditches that imitated natural streams.

Greenhouse Outdoor 2


Sand Dunes Swimming Pool & RV Park, Hopper, Colorado, U.S.

My rating

Type: Walk-in, Logging (campground)

Rule: Clothing required

Chemical use: Detected

Water temp: Up to 118 degrees F

Official website

  • Writer

Hot Springer Ken

A hot spring enthusiast based in Japan. Toured over 300 North American hot springs while working in Texas from 2016 to 2022. For updates, visit X or Instagram!

-, ,