Giant clay mushrooms and ancient monsters: Nebraska’s most overlooked park delivers both

It’s weirder than South Dakota’s version

Northwest Nebraska is not where most people expect to find anything strange.

But tucked inside the Oglala National Grassland, near the small town of Crawford, Toadstool Geologic Park sits like a scene from another world.

Clay pedestals rise from the ground, each one capped with a sandstone slab, shaped over millions of years into something that looks like a field of giant mushrooms. The quiet out here is complete.

And what’s buried in these rocks is stranger than the rocks themselves.

The same badlands as South Dakota, minus the crowds

The formations here share their origin story with South Dakota’s Badlands National Park.

Same rock layers, same ancient inland landscape, same geological drama, but on a scale you can actually walk through without a tour bus in your way.

The U.S. Forest Service manages the park, and it stays open year-round, 24 hours a day. Hikers often describe the place as a moonscape, and that’s not far off.

The color shifts from pale gray to rust to cream depending on the light, and nothing around you looks like anywhere you’ve been before.

Thirty-eight million years of layering, cracking and carving

Everything you see here took between 38 and 24 million years to build. Volcanoes to the west pushed ash, clay and silt across the land for millions of years.

Rivers draining the Rockies and Black Hills left coarse sand behind, and that sand hardened into sandstone.

The softer siltstone beneath eroded away faster, leaving the harder sandstone caps balanced on narrowing pedestals.

Geologists use this area as the standard measurement for similar rock deposits across North America, a benchmark called the type section for the White River Geologic Group.

Ancient rhinos and terminator pigs once roamed this ground

The rocks here preserve 30-million-year-old fossils of creatures that no longer exist anywhere on Earth.

Ancient rhinos, three-toed horses, camels, saber-toothed cats, and giant tortoises all left their remains in the stone.

Then there are the entelodonts, massive pig-like animals with bone-crushing jaws that researchers nicknamed terminator pigs.

You cannot collect anything you find, federal law prohibits it, but you can see fossils right along the trail. Scientists from Chadron State College continue working the site in cooperation with the Forest Service.

A chase frozen in rock for 30 million years

One of the most striking things in the park is something you walk right past without realizing what it is.

A 0.75-mile-long trackway pressed into rock records an ancient pursuit: entelodonts following two species of rhinoceros along what used to be a stream channel.

Giant tortoise tracks and ancient cat tracks show up nearby.

It ranks among the longest and most diverse prehistoric mammal trackways in North America from this period. The animals that made these prints lived and died here long before humans existed anywhere on the planet.

The one-mile loop puts you inside the formations

The main trail runs a one-mile loop starting from the campground.

It winds through the heart of the eroded landscape, past clay columns and sandstone caps, and through narrow passages between formations. Grab a free interpretive brochure at the trailhead before you head out.

Numbered posts along the route line up with the guide and explain what you’re seeing at each stop.

The trail involves some light scrambling over rock, nothing technical, but there’s almost no shade, so bring water and cover up before you start.

Three miles of grassland lead to a bison graveyard

From the interpretive loop, the Bison Trail runs three miles one-way across open Oglala Grassland to the Hudson-Meng Education and Research Center.

A local rancher discovered the site in 1954, and it holds the remains of up to 600 bison that died about 10,000 years ago. Researchers still don’t agree on what killed them.

Hudson-Meng keeps very limited hours, open only on Fridays from 9 a.m. to 4 p.m. Mountain Time, from Memorial Day weekend through Labor Day weekend. Confirm availability before you plan the walk out there.

The five-mile loop connects badlands to big sky prairie

If you want more ground, a five-mile loop starts at the campground and heads north through both the badland formations and the surrounding grassland.

It connects to the Great Plains Trail, a cross-country network that stretches from Guadalupe National Park in Texas all the way to the Canadian border.

The route crosses 918 Road before looping back through the Bison Trail to the campground. You can hike it in either direction.

This longer option gives you a full read of both landscapes in a single morning.

A sod house built from the only material available

Near the campground, a reconstructed sod house shows how homesteaders survived on a treeless prairie with almost nothing to work with.

The Forest Service built it in 1984 near the spot where someone had lived briefly in an original sod house starting in 1929, before leaving it behind.

The thick walls hold the cool air inside even on hot days, and walking in from the summer sun, you feel the difference right away. The original structure has fully disappeared back into the ground with no trace left.

Pronghorn, prairie dogs and hawks own this grassland

The Oglala National Grassland surrounding the park gives you the best shot in Nebraska at seeing pronghorn antelope.

Prairie dog colonies run along the northern border of the grassland, and if you slow down and watch, you’ll catch them popping in and out of their mounds.

Red-tailed hawks, Swainson’s hawks, ferruginous hawks and golden eagles circle overhead. Swift foxes live out here too, though they mostly move at night.

Coyotes and badgers round out the list of animals working the land around you.

Camping under skies with no competition from city lights

The campground has 12 sites, each with a picnic table, fire ring and grill. Two accessible vault toilets are on site, but there’s no water, so bring everything you need.

Day use runs $3 per vehicle, and camping is $15 per night, all first-come, first-served.

The park stays open through winter, but from mid-November through early May, services scale back and you pack out everything you pack in.

The cell service out here runs from weak to nothing, so download what you need before you leave the highway.

The drive in is gravel, the payoff is the whole point

From Crawford, take Highway 2 north about four miles to Toadstool Road, then follow the gravel about 11 miles to the campground. Coming from Hot Springs, South Dakota, take Highway 71 south 37 miles to the same road.

The gravel can turn rough or impassable after rain, so check the forecast before you go. No gas stations, restaurants or services sit anywhere near the park.

Fill your tank and stock your cooler before you leave town. The remoteness is not a flaw.

It’s the reason the place still looks the way it does.

Why people who go once talk about it for years

Toadstool Geologic Park keeps changing. Old formations collapse.

New ones slowly take shape as erosion keeps working. Most days, you’ll have the entire park to yourself.

No crowds, no noise, just rock and grass and open sky.

Thirty million years of Earth’s history sits right at the surface here, close enough to touch, though you shouldn’t.

For anyone cutting through the northwest corner of Nebraska or swinging south from the Black Hills, the 11 miles of gravel road to get here is a trade worth making.

Visit Toadstool Geologic Park in Nebraska

To reach Toadstool Geologic Park, head about 20 miles northwest of Crawford in the Oglala National Grassland. The park stays open year-round, 24 hours a day.

Day use costs $3 per vehicle, and overnight camping runs $15 per night with no reservations needed. Three trails leave from the campground, ranging from one mile to five miles.

For current road and trail conditions, contact the Pine Ridge Ranger District before you head out. Go on a weekday if you can, and plan to stay long enough to walk at least the main loop.

This article was created with AI assistance and human editing.

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