Badlands National Park

Most parks protect one landscape. Badlands protects two that have no business being next to each other: a wall of shattered, striped rock that looks like the earth was torn open, and — right up against it — the largest protected stretch of mixed-grass prairie in the United States. You can stand with one foot on bare 35-million-year-old sediment and the other in grass that has never been ploughed.

The rock is young, soft and in a hurry. The layers are river mud, floodplain silt and volcanic ash washed east off the rising Black Hills, stacked on top of the black seabed shale of an inland sea. Nothing here is granite; almost nothing holds together. The formations you photograph are eroding at roughly an inch a year, which is fast enough that the park you visit is measurably not the park your parents visited, and fast enough that the whole system is expected to erode away entirely within another half a million years.

That erosion is also why this is one of the richest fossil beds on earth. Every inch the rain takes off the buttes exposes something that was buried in the Eocene and Oligocene — and it is why Badlands is regarded as the birthplace of vertebrate palaeontology in North America. Ancestral horses, rhinos, camels and sabre-toothed predators came out of this ground before the park existed to protect it.

September and May are the two windows worth planning around. The prairie is alive, the light is long, and the temperature is not actively working against you.

• Spring (April–May): the prairie greens up and the park empties of winter. The catch is water — April and May are wet months, and wet Badlands clay is genuinely treacherous underfoot.
• Summer (June–August): peak season and peak difficulty. June is the wettest month of the year here and brings what the park calls violent thunderstorms — with hail and occasional tornadoes. July and August sit in the low 90s°F with no shade anywhere. It is also when the ranger night-sky programme runs nightly, which makes a summer trip a two-shift day: dawn and after dark.
• Autumn (September–October): our pick. Warm days, cold nights, golden grass, thin crowds and stable weather.
• Winter (November–March): the park never closes and is open 24 hours a day, but roads through the Badlands may close in extreme weather, and 12 to 24 inches of snow falls across the season. The reward is a striped wall under snow with nobody else on the road.

One number worth carrying: this park has recorded temperatures from 116°F to −40°F. Whatever the forecast says, dress for it changing.

Badlands sits 75 miles east of Rapid City, and the park's own directions are given as interstate exits rather than as a drive from anywhere: Exit 131 (Interior) if you are heading west, then about three miles south to the Northeast Entrance; Exit 110 (Wall) if you are heading east, then about seven miles south to the Pinnacles Entrance.

Between those two entrances runs the Badlands Loop Road (Highway 240), the paved scenic spine with the overlooks strung along it. Most visitors do exactly this and nothing else — which is why the overlooks are busy and the trails, all of which sit within a few miles of the visitor center, are quieter than the car parks suggest.

Two practical warnings the park makes itself. First, do not trust GPS to get you here — the park has a standing alert about navigation apps sending visitors to the wrong place. Second, the park is open 24 hours a day, which is genuinely useful: sunrise, sunset and the night sky are the three best things on this landscape and none of them require a gate to be staffed.

Badlands has eight maintained trails and almost all of them are short. Sorted by what they ask of you:

• Boardwalks (¼ mile each): the Window Trail to a natural gap in the Wall and the Fossil Exhibit Trail, a fully accessible boardwalk past replicas of the animals that came out of this rock. Both are wheelchair-workable and both are worth doing.
• Short and interesting: Door Trail (0.75 mi) runs a boardwalk through a break in the Wall and then simply stops — beyond it, yellow posts mark a primitive route across bare bedrock and travel is at your own risk. Cliff Shelf Nature Trail (0.5 mi) climbs about 200 feet by boardwalk and stairs through a rare pocket of juniper.
• Steep and short: Saddle Pass (0.25 mi) goes straight up the Wall on loose clay. The park's own word for it after rain is treacherous, and it means it.
• The signature: Notch Trail (1.5 mi) climbs a log ladder and follows a ledge to a gap with a view over the White River valley. The park calls it the most popular trail in Badlands and says it also sees the most injuries. Not for anyone uneasy with heights, and not after rain or snow.
• Long and flat: Medicine Root Loop (4 mi) and Castle Trail (10 mi round trip, the longest here) cross open prairie between the Door/Window car park and the Fossil Exhibit Trail. They are level. They are also completely exposed, and that — not the climbing — is the difficulty.

Then the part that makes this park unusual. Badlands has an open hike policy: you may legally walk off-trail, anywhere. Very few national parks allow that, and it exists here because the surface is bare eroding rock rather than something a footprint destroys. It is a real freedom and a real responsibility — there are no markers, the buttes all start looking alike, and the ground crumbles.

You will probably see one. Erosion at an inch a year means fossil bone turns up on the surface constantly, and the park protects some of the richest Eocene and Oligocene mammal beds anywhere in the world.

The rule is absolute: leave it exactly where it is. Collecting, moving or pocketing a fossil in a national park is a federal offence — but the better reason is scientific rather than legal. A tooth in a drawer is a curiosity; a tooth still sitting in its layer tells a researcher when the animal lived, what was buried with it and what the climate was doing. Pick it up and you have destroyed most of what made it valuable, permanently. Note where it is, photograph it, and tell a ranger.

If you want to see the science happening rather than just the rock, the park runs a fossil preparation lab at the Ben Reifel Visitor Center where you can watch specimens being worked on. With children, it is the single best twenty minutes in the park for turning “old bones” into something they care about.

The grassland here is not scenery, it is the point. Badlands holds a functioning mixed-grass prairie ecosystem, which is rarer than the rock formations are.

• Bison were reintroduced in 1963 after roughly a century of absence, and now graze the Sage Creek area. They are the reason the 100-yard rule exists: stay at least that far away, do not approach for a photograph, and treat a bison beside the road as a reason to stay in the car.
• Prairie dogs are the species everything else depends on. Their towns house burrowing owls, snakes and — most importantly — the black-footed ferret.
• Black-footed ferrets were believed extinct in the 1970s and were reintroduced here in the 1990s. They are one of North America's most endangered mammals and they live almost entirely on prairie dogs and in prairie dog burrows. You are unlikely to see one; the fact that they are out there at all is the achievement.
• Bighorn sheep, pronghorn, coyotes and swift fox round out the list, along with prairie rattlesnakes, which are a genuine trail hazard rather than a theoretical one.

A warning that sounds odd until you hear the reason: do not walk into a prairie dog town, and do not let children near the burrows. Fleas on the rodents can carry plague, which is why the park bans pets from these areas outright — and why that ban extends even to service animals, one of the very few places in the national park system where that happens.

Badlands is a strong family park for an unglamorous reason: the best things in it are short. Two quarter-mile boardwalks, a fossil lab and a road full of overlooks add up to a full day without a single hard mile.

• Fossil Exhibit Trail is the one to build the day around — a flat, fully accessible boardwalk past models of the animals that lived here, and the easiest way to make 35 million years mean something to a seven-year-old.
• The fossil prep lab at Ben Reifel Visitor Center: real specimens, real people working on them, and air conditioning in July.
• Junior Ranger, plus a separate Night Explorer badge earned at the summer night-sky programme — a genuinely good excuse to keep children up late.
• Window and Door Trails give the big view for a few hundred yards of walking.

Three honest cautions. The rock looks climbable and is not: it is soft, crumbly sediment, and a ledge that holds an adult's weight for a second may not hold it for two. Notch Trail's ladder and ledge are not toddler terrain and the park says outright that it sees the most injuries in the park. And there is no water and no shade on any trail — children dehydrate faster than adults do, so carry more than feels sensible and treat midday as indoor time.

This is one of the strictest pet policies in the system, and it is stricter than the grade alone suggests.

Where dogs may be, in the park's own words: “only … in developed areas, such as campgrounds and picnic areas, and other areas open to motor vehicles, such as gravel and paved roadways, roadway corridors, and parking lots”, always on a leash of six feet or less.

Where they may not: “hiking trails, public buildings … and backcountry areas, including the Badlands Wilderness Area, and areas with prairie dog colonies”. Note that this bars the paved boardwalks too — there is no easy walk here that a dog can legally do.

The prairie dog clause is the unusual one. Service animals are normally exempt from pet restrictions and are welcome on trails and in buildings here — but they are also barred from prairie dog colonies, because fleas on the rodents can carry plague. That is a disease rule, not a convenience rule, and it is worth knowing before you arrive with a working dog.

And the car is not the answer. Summer here runs into the 90s°F on open ground with no tree cover; a parked car becomes lethal in minutes. If your day includes any trail at all, the dog needs to be somewhere else — Rapid City, 75 miles west, is where the boarding and daycare options are.

Badlands is remote enough, and far enough from any city, that the dark here is the real thing. The park leans into it harder than most: rangers and volunteers run Night Sky Viewings every night through the summer, using laser pointers to walk you around the constellations and the park's own 11-inch telescopes to show you what is up there. Children can earn a Night Explorer Junior Ranger badge for taking part.

Once a year the park hosts the Badlands Astronomy Festival, which brings professional and amateur astronomers, solar observing and guest speakers to the same dark patch of prairie.

Because the park is open 24 hours and the Loop Road has pull-offs the whole way, you do not need a programme to do this — pick an overlook, let your eyes adapt for twenty minutes, and check the moon phase before you commit. A new moon is what you want; a full one lights the formations beautifully and erases the Milky Way.

Badlands is administratively two places, and most visitors only ever see one. The North Unit holds the Loop Road, the trails, the visitor center and the designated Badlands Wilderness Area. The South Unit, on the Pine Ridge Indian Reservation, is co-managed with the Oglala Lakota — an arrangement with very few parallels in the system.

The name itself is a translation. The Lakota called this Makȟóšiča: bad lands. It is a description of the ground, not of the place.

The South Unit's history is not scenery and should not be visited as if it were. The 1868 Fort Laramie Treaty recognised this land as belonging to the Sioux Nation; in 1889 that treaty was broken and the land taken. The Stronghold Table was the site of one of the last Ghost Dances, the movement that preceded the Wounded Knee massacre of 1890. In the 1940s families were removed again when part of the land was seized as a gunnery range for the Second World War.

If you go, go to the White River Visitor Center first, ask what is appropriate to visit, and accept the answer. Some of this landscape is a ceremonial site rather than a viewpoint.

Badlands does better than most parks of its type, largely because its two best short trails are boardwalks.

• Fossil Exhibit Trail — a fully accessible boardwalk, and one of the most interesting quarter miles in the park rather than a consolation prize.
• Window Trail — wheelchair accessible, with restrooms at the trailhead, and a view straight through the Wall.
• Door Trail — the boardwalk section is accessible; past its end the route becomes bare bedrock marked with posts and is not.
• The Loop Road does much of the work: the overlooks are the park's signature views and they are all roadside.
• Both visitor centers are accessible, with ramped entrances, reserved parking and accessible restrooms.

Be realistic about the rest. Notch, Saddle Pass, Castle and Medicine Root are unimproved ground on soft, uneven, sometimes slick clay, and Cliff Shelf includes stairs. Nothing off the boardwalks is a smooth surface.

The hazards here are not dramatic ones. They are the quiet kind that catch people out on a short walk:

• No water anywhere. Not on the trails, not in the backcountry — and the park is explicit that the little backcountry water there is carries too much sediment to filter. Two quarts per person for a two-hour hike; a gallon a day if you are out overnight.
• No shade anywhere either. Open prairie and bare rock, in a park that has recorded 116°F. Walk the long trails at dawn.
• Wet clay is a different surface. Saddle Pass and the Notch ledge go from awkward to genuinely dangerous after rain or snow. The rock does not grip.
• The rock breaks. These formations are soft sediment, not granite. Do not climb on them and do not trust an edge because it looks solid.
• Storms arrive fast. June is the wettest month and the park warns of violent thunderstorms, hail and occasional tornadoes. There is nowhere to shelter on the prairie except your vehicle.
• Prairie rattlesnakes and cactus. The park's own advice is sturdy closed boots; watch where you put hands and feet, especially in rocky rubble. Ticks are a real risk in the grass too.
• Bison at 100 yards, prairie dog towns not at all. See Wildlife, above — the plague risk is why that second rule exists.

8 trails, each with its own page — distance, elevation gain, water and restroom data where the park publishes it. Window Trail is the first in the table above.

Cliff Shelf Nature Trail — 200 ft of gain over 0.5 miles. Gain is what decides how hard a day feels; the mileage on its own is the number that misleads people.

Badlands National Park grades D on our A–D pet-policy scale. Dogs are restricted to paved roads, campgrounds and parking areas — almost no trails. Leashes (6 ft max) are required everywhere.

Our age-rated trails here start at 0+, and 4 of them suit kids 8 and under.