Drive two hours from Salt Lake City and land on the whitest, flattest place in America

It’s also shrinking every year

Drive about 110 miles west of Salt Lake City on Interstate 80, and the world goes white.

The Bonneville Salt Flats spread across 30,000 acres of hard, bright crust in Tooele County, stretching 12 miles long and five miles wide.

The salt runs almost five feet thick at the center and thins to less than an inch at the edges. You can visit for free, any time of year.

But this landscape is losing ground, and the story of how it got here goes back 30,000 years.

A prehistoric lake a thousand feet deep left all this salt

Lake Bonneville once covered about a third of Utah.

At its peak, roughly 30,000 to 13,000 years ago, the water reached over 1,000 feet deep right where the flats sit now. Then the climate warmed and dried, and the lake slowly evaporated.

What stayed behind were thick mineral deposits, mostly halite, which is just table salt, along with gypsum, potassium and magnesium. The Great Salt Lake is another leftover from that same ancient body of water.

The Donner party got stuck in mud under the crust

The Bonneville Salt Flats hold about 147 million tons of salt, and roughly 90 percent of it is common table salt. That bright white surface looks solid, but the Donner-Reed party of 1846 learned otherwise.

They crossed the flats on the Hastings Cutoff route to California, and their wagons broke through the crust into thick mud underneath.

The delays they racked up here fed directly into the hardships that caught them later in the Sierra Nevada.

Speed racers hit 143 mph here back in 1914

The hard, flat ground pulled speed chasers early. In 1914, Teddy Tetzlaff drove a Blitzen Benz across the salt at roughly 143 mph.

By 1925, Utah’s own Ab Jenkins raced a Studebaker against a train on the flats and beat it by 10 minutes.

Then in 1935, British racer Sir Malcolm Campbell pushed his Bluebird to 301 mph and set the first official land speed record here.

The Bonneville Salt Flats Race Track now sits on the National Register of Historic Places.

A rocket car hit 630 mph and the record still stands

In 1970, Gary Gabelich climbed into the rocket-powered Blue Flame and hit 630 mph on these same flats. That remains the last outright world land speed record set at Bonneville.

Every August, Speed Week brings hot rods, streamliners, motorcycles and even diesel trucks to the Bonneville Speedway for about six days of racing organized by the Southern California Timing Association.

World of Speed follows in September, and World Finals close out October, giving racers one last shot at records for the year.

Watch vehicles streak across an endless white line

Spectators can show up to Speed Week and watch from the salt.

You’ll see machines of every shape tear across a surface so white and flat that the vehicles seem to float. But you don’t need a racing event to walk on the flats.

Park at the rest area off Interstate 80 near milepost 10 or take Exit 4 to the Bonneville Speedway access road. The dry salt crunches under your feet, and the jagged crystals can cut, so wear sturdy shoes.

Mirages make the desert look like a giant lake

On hot days, the bright white surface plays tricks.

Mirages shimmer across the ground and make the dry salt look like open water stretching to the horizon. The salt also leaves white residue on everything it touches, from your shoes to your clothes to your skin.

There are no facilities, no shade and no water out on the flats, so bring your own supplies. Lighter-colored clothing helps because salt dust shows less on it.

A thin layer of water turns everything into a mirror

In late winter and early spring, shallow water often covers the salt and creates a massive natural mirror. The sky, clouds and surrounding mountains reflect back with sharp clarity.

For the best photos, go at sunrise when the air is still. Even a light breeze breaks up the reflection.

The wet season runs roughly from late fall through early spring, though conditions shift with weather. You cannot drive on the flats when they’re wet, because vehicles punch through the fragile crust into thick mud.

The Milky Way shows up with zero light pollution

The Bonneville Salt Flats sit far enough from any city that almost no light pollution reaches them. At night, the Milky Way stretches overhead in full detail.

During the day, sunrise and sunset throw color across the salt or water, depending on the season.

When the crust is dry, geometric ridges and hexagonal patterns form in the salt and give you ground-level texture you won’t find anywhere else.

Personal photography is free, but commercial filming needs a permit from the BLM.

An 87-foot sculpture rises out of pure nothing

About 25 miles east of Wendover on the westbound side of Interstate 80, an 87-foot sculpture stands alone against the white.

Karl Momen, a Swedish-based artist, built “Metaphor: The Tree of Utah” between 1982 and 1986 as a personal gift to the state.

It took 225 tons of cement, nearly 2,000 ceramic tiles and tons of native Utah minerals and rocks.

Six colorful spheres sit on a square trunk, and a plaque at the base carries words from Friedrich Schiller’s Ode to Joy. A fence rings the base, but you can see it clearly from the highway.

The flats lost 15 square miles in just 30 years

The salt crust has thinned for decades. The area earned a designation as an Area of Critical Environmental Concern back in 1985, and in 30 years, the flats shrank from about 50 square miles to roughly 35.

Maximum crust thickness dropped from seven feet in 1960 to about 5.5 feet by 1988.

In 1998, the BLM, racing groups and a nearby potash mining company launched the Salt Laydown Project to pump brine back onto the surface.

University of Utah researchers have since found the system is more complex than anyone first thought, and the work continues.

Salt water can cost you $5,000 if your car gets stuck

The salt water here corrodes metal fast. It eats at vehicle electrical systems and undercarriage paint, so wash your car thoroughly as soon as you leave.

The edges of the flats are much thinner than the center, and driving near them raises your odds of sinking into deep mud. Recovery for a stuck vehicle can run close to $5,000.

Summer temperatures top 100 degrees, winter lows drop well below zero, and storms roll in fast with high winds and rain that turn the surface slick.

Keep your car or a landmark in sight at all times, because the featureless white can disorient you quickly.

Drive 90 minutes from Salt Lake City and walk right on

The flats sit about 110 miles west of Salt Lake City, a straight shot down Interstate 80 that takes roughly an hour and a half.

There is no entrance fee and no set hours, though seasonal closures happen when the surface is wet.

Two main stopping points give you access: the I-80 Rest Area near milepost 10 and the Bonneville Speedway viewpoint at Exit 4. The rest area has restrooms and an outdoor water spout for rinsing off salt.

You can’t camp on the flats, but surrounding public lands allow it.

Explore the Bonneville Salt Flats in Utah

You can walk right onto the salt without paying a dime.

The Bonneville Salt Flats sit in Tooele County, about 110 miles west of Salt Lake City off Interstate 80. The Bureau of Land Management runs the site, and it stays open year-round.

Pull off at the I-80 Rest Area near milepost 10 or take Exit 4 to the Bonneville Speedway road. The nearest services, including gas and food, are in the town of Wendover at the Utah-Nevada border.

Check the official BLM page for current conditions before you go.

This article was created with AI assistance and human editing.

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