Idaho’s most improbable rock formation is balancing on 17 inches and has been for eons

It’s been defying gravity for millions of years

Somewhere in southern Idaho’s Salmon Falls Creek Canyon, a 48-foot-tall rock sits on a pedestal so narrow it looks like a mistake. The base measures 3 feet wide and about 17 inches across.

That’s it. That’s all that holds 40 tons of volcanic rock off the ground.

The formation sits about 35 miles west of Twin Falls, near the small towns of Buhl and Castleford, and the Bureau of Land Management keeps watch over it.

But the real story is how it got there, and what surrounds it in the canyon below.

Eight million years of volcano and wind made this

Balanced Rock is rhyolite, a volcanic rock that forms from slow-moving, silica-rich lava.

Geologists date the flow that created it to about 8 million years ago, tied to ancient Snake River Plain volcanism and the same Yellowstone hotspot track that shaped much of the region.

As the North American Plate shifted over that hotspot, it left behind layers of rhyolite across southern Idaho. You can find the same rock at Jarbidge Canyon and parts of Bruneau Canyon.

Wind and weather did the sculpting, wearing the softer stone away faster than the harder cap through differential weathering until the whole thing looked like a mushroom balanced on a toothpick.

The canyon floor is packed with stone pillars

Balanced Rock gets the fame, but the canyon around it holds dozens of tall rock columns made of the same volcanic rhyolite.

Locals call them hoodoos, and if you look long enough, some of them start to resemble faces or figures. They formed millions of years ago when hot volcanic rock cooled and cracked into vertical shapes.

What catches you off guard is the drive in.

You’re rolling through flat Idaho farmland, and then the ground drops away into rock walls with no warning at all.

A steep climb puts you right next to the base

A short trail leads from a small parking area with a picnic table up to the rock itself. It’s steep but quick, and you’ll want sturdy shoes on your feet.

Once you reach the top, you can walk all the way around the formation and see it from every angle.

Standing next to it is the only way to understand the scale, because that tiny base looks even more impossible up close. Stay alert near the canyon edges, though.

The drop-offs are real and there are no guardrails.

Free camping in a shady box canyon

Just down the road, Twin Falls County runs Balanced Rock Park in a box canyon shaded by cottonwood trees along Salmon Falls Creek.

You’ll find about a dozen informal campsites, covered picnic tables, fire rings, grills, and a pavilion you can rent. Camping is free, first-come, first-served, and you don’t need a reservation.

There are no RV hookups, but you get pit toilets, trash cans, and water spigots. The creek and the cottonwoods do the rest.

Follow Salmon Falls Creek deeper into the canyon

Salmon Falls Creek runs right through the park, and you can fish it if the season is right. The current picks up depending on snowmelt, so keep your distance when the water runs fast.

At the back of the park, a trail follows the creek about a mile deeper into the canyon. You’ll pass more hoodoos and rock formations off the main path.

Keep your eyes open for rock chucks, which are yellow-bellied marmots, and owls tucked into the canyon walls.

The Milky Way shows up on clear nights

Southern Idaho sits far from city lights, and the remote canyon around Balanced Rock makes the sky even darker. On a clear night, you can see the Milky Way stretched out directly overhead.

Sunrise and sunset bring a different kind of show, when the changing light throws long shadows and silhouettes across the rock formation.

Photographers come at golden hour and stay after dark to shoot the rock against a sky full of stars.

A man once tried to chop it down with a pickaxe

People have marveled at Balanced Rock for as long as anyone in southern Idaho has kept records.

A 1929 account in the Twin Falls Daily News reported that a local man took a pickaxe to the narrow base because he was tired of waiting for the rock to fall on its own.

A neighbor warned him the stone weighed hundreds of tons and could kill him. Somebody eventually reinforced the base with a layer of cement to protect it.

The site has also dealt with graffiti and litter over the years, so treat the place with care when you go.

Drive the 67-mile scenic byway to get there

Balanced Rock sits just off the Thousand Springs Scenic Byway, a 67-mile route along U.S. Highway 30 through some of southern Idaho’s most striking terrain.

The byway starts near Bliss and follows U.S. 30 southeast through Hagerman, Buhl and Twin Falls, linking up with Idaho 50 and U.S. 93 back toward I-84.

Along the way, you’ll pass waterfalls, natural hot springs and small towns. Thousand Springs State Park alone covers six separate units with trails, wildlife and canyon views.

It’s one of Idaho’s 31 designated scenic byways.

Shoshone Falls stands 45 feet taller than Niagara

About 35 miles east of Balanced Rock, near Twin Falls, Shoshone Falls drops 212 feet on the Snake River. That’s 45 feet higher than Niagara Falls, and the cascade stretches about 900 feet wide.

Spring and early summer bring the best flow, when snowmelt fills the river and the falls run at full power.

Shoshone Falls Park surrounds the site with playgrounds, hiking trails, picnic areas and a scenic overlook where you can stand close enough to feel the mist.

Fossils of saber-toothed cats and ancient horses sit nearby

Near Hagerman, along the scenic byway, Hagerman Fossil Beds National Monument protects one of the richest fossil sites from the Pliocene epoch, about 3 to 4 million years ago.

The star find is the Hagerman Horse, Idaho’s state fossil, an early ancestor of modern horses and zebras that looked something like a Grevy’s zebra.

The site has produced more than 200 individual horse fossils and over 200 plant and animal species, including saber-toothed cats and mastodons.

A shared visitor center in Hagerman holds fossil replicas and exhibits, and a section of the Oregon Trail crosses the monument grounds.

Watch BASE jumpers leap from 486 feet up

The Perrine Bridge carries U.S. Highway 93 over the Snake River Canyon on the north edge of Twin Falls, and its main deck sits 486 feet above the river.

Pedestrian walkways on both sides give you wide-open canyon views.

This is one of the only spots in the country where BASE jumping is legal year-round with no permit, and jumpers show up most days. If you’d rather keep your feet on solid ground, just watch from the walkway.

Near the bridge, you can still see the dirt ramp Evel Knievel used for his famous 1974 Snake River Canyon jump attempt.

Visit Balanced Rock in Idaho’s Salmon Falls Canyon

You can reach Balanced Rock by heading south from Buhl off U.S. Highway 30, the Thousand Springs Scenic Byway. Follow the signs toward Castleford and then to the rock.

The park and formation are open year-round, and you won’t pay a dime to get in. Twin Falls County Parks and Waterways manages the site.

Wear sturdy shoes for the steep trail and keep an eye on the drop-offs. Cell service fades in the canyon, so download your maps and directions before you head down.

This article was created with AI assistance and human editing.

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