Bonneville Seabase - Hot Springs in Utah


In my pursuit of unique hot springs, I found myself floating in a dive spot.

And it was in Utah, far from the ocean.

Inland dive site

On the southern shore of the Great Salt Lake, about a 30-minute drive from Salt Lake City International Airport, there is an interesting spot.

Entrance 01

Bonneville Seabase is a one-of-a-kind facility that offers authentic snorkeling and scuba diving in the inland state of Utah.

Its name is derives from Lake Bonneville, a huge lake that existed in this area until about 13,000 years ago.

Campground 01

The current owners, Linda Nelson and George Sanders, bought the land in 1988.

Crane 01

At the time, it was a muddy marshland littered with garbage.

Crane 02

The fragile soil was improved and reinforced with construction fabric.

The pool was also dredged with a huge crane.

Pond 01

All the hard work was for the wild dream of building a diving spot using natural hot springs.

Office 01

It's outrageous that they have really made it happen.

Reception 02

Visits during the pandemic were by appointment only.

A deposit of $10.00 was required at the time of reservation.

Reception 01

Day use was a total of $20.00 (as of this writing).

All kinds of snorkeling and diving equipment could be rented separately.

Shower Room 01

The shower room was also very practical, never looking like a spa facility.

Shower Room 02

White Rocks Bay

There were three dive sites on the property.

White Rock Bay 01

The entrance to White Rocks Bay was inside a plastic greenhouse.

Geothermal crops were also being grown inside.

White Rock Bay 03

White Rocks Bay is the pool where you can find the most diverse tropical fish.

White Rock Bay 02

Most of the pool without plastic houses was covered with translucent roofs.

White Rock Bay 04

There are several springs the bottom of the pool, and the Water temp rose to 95 degrees F in the summer when it was first opened.

White Rock Bay 05

As the amount of water in the Great Salt Lake decreases, the amount of hot water input also tends to decrease, and the water surface temperature was 75 degrees F when I visited.

Fish 01

Bonneville Seabase

The minerals left behind at the bottom of the ancient Lake Bonneville, which has dried up, are dissolved in a perfect concentration to allow marine life to live.

It didn't feel like a typical hot spring, but it was similar to swimming in the ocean.

Habitat Bay

Habitat Bay 01

The largest area was occupied by Habitat Bay.

The Trench 01

It formed an integrated pool with the long, narrow The Trench that drained from it.

Habitat Bay 03

There was also a shallow area, so if you just want to soak, this may be a good place to do so.

The Trench 02

I liked the fact that it retained the most of the natural atmosphere.

The Abyss

The Abyss 02

The Abyss has a depth of  62 feet, allowing for full-scale deep-sea training.

I've finally come to the wrong place.
You are out of place from the start.
The Abyss 01

It was not at all the kind of place I expected to spend a relaxing day at a natural hot spring, but I wasn't too disappointed.

Rather, I was impressed by a kind of American dream that was accomplished by taking full advantage of the salty warm water.


Bonneville Seabase, Grantsville, Utah, U.S.

My rating

Type: Walk-in, Lodging (RV park)

Rule: Clothing required

Chemical use: No

Water temp: Up to 75 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!

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