One exit off I-80 drops you onto the whitest, flattest ground in the country

Utah’s strangest landscape costs nothing to enter

Thirty thousand acres of white salt sit in northwestern Utah, and most people driving past on Interstate 80 don’t stop. That’s a mistake.

The Bonneville Salt Flats are about 120 miles west of Salt Lake City, free to enter, and open year-round. The surface crunches underfoot.

Heat waves turn the desert into a mirage. And somewhere out there, the horizon curves.

You won’t find anything else like this in the country, and the window to see it at full size is getting smaller every year.

An Ice Age lake left behind 147 million tons of salt

About 30,000 years ago, a lake the size of Lake Michigan covered much of western Utah, spilling into Nevada and Idaho.

Lake Bonneville held that footprint for thousands of years before the climate shifted and the water began to disappear. What it left behind was a thick crust of minerals, mostly common table salt.

Near the center, that crust runs up to five feet deep. At the edges, it thins to less than an inch.

The lake is gone, but 147 million tons of what it carried are still here.

The Donner-Reed Party crossed here and lost everything

In 1846, a group of westward-bound settlers took a route across the salt flats called the Hastings Cutoff. It was sold to them as a shortcut to California.

Their wagons broke through the salt crust and sank into the mud below, trapping them for days. That delay cost the Donner-Reed Party weeks they couldn’t afford.

By the time they reached the Sierra Nevada mountains, winter had closed the passes. When archaeologists examined the route in 1986, wagon tracks from the crossing were still pressed into the ground.

Cars have hit 400 miles per hour on this natural surface

Racers discovered the salt flats in 1914. The surface was hard, flat, and seemingly endless, which made it the fastest natural racetrack on earth.

By 1949, the Bonneville Speedway had become the official standard for world land speed records. Over the following decades, drivers broke the 300, 400, 500, and 600 mile-per-hour barriers right here.

The site earned a spot on the National Register of Historic Places.

Speed Week in August, the World of Speed in September, and the World Finals in October still draw racers from around the world every year.

Standing on the salt feels like standing on the moon

You walk out from the rest area near milepost 10 and the crust crunches under your feet like frozen snow. Look down and the salt crystals are jagged enough to cut bare skin.

Look up and the white runs flat in every direction, broken only by a rim of low mountains miles away. There are no trees.

No buildings. On a hot day, the heat bends the air above the salt into what looks like water shimmering in the distance. The silence out there is the kind you feel.

Sunrise turns the salt into liquid gold

The flats are one of the most photographed landscapes in the American West, and the light is the reason. At sunrise and sunset, the white surface picks up the gold and orange and pink and throws it back at you.

In spring and fall, thin sheets of water sometimes cover the flats and turn the entire surface into a mirror, reflecting the sky so cleanly that the horizon disappears.

After dark, the distance from city lights makes the Milky Way visible in a way most people have never seen it. Your camera will not do it justice.

Go anyway.

You can drive your car out onto the salt, but read this first

From June through August, when the flats are dry, you can drive your vehicle straight out onto the surface.

The experience of rolling across hard white salt with nothing on the horizon in any direction is genuinely unlike anything else in the country. But the salt is highly corrosive.

It works into your undercarriage, your wheel wells, and your electrical system. If you’re in a rental car, check your agreement before you pull off the pavement.

Many rental companies won’t cover the damage, and the damage is real.

Speed Week draws parachute-stopping cars doing 400 miles per hour

During Speed Week in mid-August, the Bonneville Speedway fills with machines you won’t see anywhere else.

Custom streamliners, modified muscle cars, motorcycles, and even souped-up scooters all compete on different courses across the salt.

The fastest vehicles in the top classes cross 400 miles per hour and deploy parachutes to stop because the brakes alone won’t do it.

The racing community calls Bonneville the last place where serious amateur speed racing still happens at this level. In 2015 and again in 2022, poor salt conditions forced cancellations, a sign of what’s coming.

The salt crust has shrunk by a third in 60 years

The flats are smaller than they used to be. The overall footprint has dropped to about half of its peak size from 1994, and the crust itself has thinned by roughly a third over the past six decades.

Scientists point to drought, nearby potash mining operations, and the effects of decades of racing.

The Bureau of Land Management designated the flats an Area of Critical Environmental Concern back in 1985, and crews have been pumping salt-rich brine back onto the surface in an effort to slow the loss.

A $1 million research project through the Utah Geological Survey is still trying to understand exactly what’s happening.

An 87-foot concrete tree rises from the middle of nowhere

About 25 miles east of Wendover, something rises from the desert floor that stops drivers cold.

A concrete sculpture stands 87 feet tall, covered in nearly 2,000 ceramic tiles and topped with six colorful spheres coated in rocks and minerals from Utah.

Swedish artist Karl Momen built it between 1982 and 1986, paid for it himself, and gave it to the state of Utah. He called it “Metaphor: The Tree of Utah.”

A plaque at the base carries words from Friedrich Schiller’s “Ode to Joy.” Nothing around it for miles in any direction.

Come prepared, because the flats give you nothing

There are no restrooms on the flats, no shade, no water, no cell service, and no one coming to help if you need it.

Summer temperatures push past 100 degrees, and the white surface reflects sunlight straight up, so you’ll burn under your chin and nose faster than you expect.

Wear shoes you don’t care about because the salt gets into everything. Camping on the flats is not allowed, but surrounding public lands permit it.

The town of Wendover, right on the Utah-Nevada border, has lodging if you want a bed.

See it now, because it keeps getting smaller

The Bonneville Salt Flats are one of the only places in the world where a salt expanse this size sits open to the public at no cost. The scale alone changes how you think about space.

The silence changes how you hear things. Standing on 30,000 acres of white with nothing between you and the horizon is the kind of experience that takes a while to shake. The crust is thinner every decade.

The footprint is smaller every year.

What’s there now is less than what was there before, and what’s there before long will be less than what’s there now.

Visit the Bonneville Salt Flats in Utah

You can reach the flats from the Salt Flats Rest Area on westbound Interstate 80, about 120 miles west of Salt Lake City near Wendover, Utah.

Exit 4, marked as the Bonneville Speedway exit, gives you another access point. There’s no admission charge and no reservation needed.

The best time to walk or drive on the salt runs from June through August when the surface is dry.

During racing events between June and October, access past designated areas is limited, so check conditions before you go.

This article was created with AI assistance and human editing.

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