This canyon off I-40 in Arizona hides 80 cliff dwellings you can walk right up to

Arizona’s most overlooked ancient neighborhood

About 10 miles southeast of Flagstaff, just off Interstate 40, Walnut Canyon cuts 400 feet into the earth over a 20-mile stretch of northern Arizona.

Carved by Walnut Creek over millions of years, the canyon walls hide something most people drive right past: more than 80 cliff dwellings built by the Sinagua people over 700 years ago. You can walk up to 25 of them.

Close enough to touch. That changes how you think about the word “ancient.”

Who the Sinagua were and why they came here

The name “Sinagua” comes from Spanish words meaning “without water,” which tells you something about how tough life was here.

These people grew corn, beans and squash on the dry canyon rims using farming methods that squeezed crops out of hard soil.

They hunted deer and small game and gathered wild plants, including the black walnuts that gave the canyon its name. The Hopi trace their ancestry to the Sinagua and consider this canyon one of their ancestral homelands.

Today, 13 federally recognized tribes, including the Zuni, Navajo and Havasupai, hold traditional connections to the Flagstaff Area National Monuments.

Rooms with blackened ceilings from 800-year-old fires

The Island Trail drops 185 feet into the canyon on a paved one-mile loop, and it wraps around a large rock formation that the creek nearly surrounds on all sides.

Along the way, you pass 25 cliff dwelling rooms built under natural limestone ledges, with many more visible across the canyon walls.

Peer inside and you’ll see soot-blackened ceilings left by cooking fires that burned when this was still someone’s kitchen.

The Sinagua built here because the limestone overhangs kept rooms cool in summer and held warmth through winter.

The easier path with canyon views worth the walk

If the Island Trail sounds like too much, the Rim Trail gives you another way in.

It’s a paved 0.7-mile loop that follows the canyon’s edge through ponderosa pine, mostly flat, with two overlooks that look straight down into the canyon.

Along the way, a restored pithouse and pueblo with posted signs walk you through what Sinagua daily life looked like up here. You can also bring your leashed dog on this one.

The Island Trail doesn’t allow pets.

Go off-trail with a ranger on a Ledge Hike

The monument runs seasonal guided hikes that take you to cliff dwellings that the regular trails don’t reach. These Ledge Hikes cover rugged ground, last several hours, and put you inside spaces that most visitors never see.

You’ll need sturdy shoes, plenty of water, solid physical fitness and a comfortable head for heights. Schedules shift from year to year, so check with the monument directly before you plan around one.

Rangers at the visitor center can tell you what’s available when you go.

Canyon walls that go back 275 million years

The canyon walls read like a stack of geology textbooks, three distinct rock layers laid down across hundreds of millions of years. The top layer is Kaibab Limestone, the same rock that forms the rim of the Grand Canyon.

Below it sits the Toroweap Formation, a softer rock that erodes into the slopes where shrubs and small trees take hold.

At the bottom is Coconino Sandstone, compressed from wind-blown desert dunes that shifted across this region about 275 million years ago.

The Sinagua built their homes in the Kaibab layer, where natural erosion had already carved sheltered alcoves into the cliff faces.

Desert plants and mountain trees growing side by side

Walk from one side of the canyon to the other and the landscape shifts in ways that don’t quite make sense at first.

The south-facing slopes get full sun all day, so prickly pear cactus and agave grow there, desert plants you’d expect to see hours south of here.

Cross to the north-facing slopes and Douglas fir and ponderosa pine take over, trees that belong at higher, cooler elevations.

Researchers have counted 387 plant species across the monument’s roughly 3,600 acres, packed into a space where desert and mountain forest run right up against each other.

Deer, elk and canyon wrens share the trail with you

The same mix of habitats that supports nearly 400 plant species also pulls in a wide range of animals. Mule deer, elk and javelina move along the trails and near the rim, sometimes close enough to stop you mid-step.

Canyon wrens, turkey vultures and ravens are the birds you’ll hear and spot most often.

The canyon acts as a travel corridor for animals moving between the lower desert and the higher pine forest, so what you see depends on the season.

Rangers ask that you keep your distance and leave the wildlife alone.

The visitor center sits right on the rim

Before you head down into the canyon, the visitor center gives you the full picture.

Large windows frame the canyon from the rim, and inside, a museum walks you through the Sinagua story and the natural history of the area through artifacts and exhibits.

A bookstore and gift shop carry books and educational materials if you want to dig deeper.

The stone patio behind the building, built by the Civilian Conservation Corps in the late 1930s, marks the top of the Island Trail and gives you your first real look at the scale of what’s below.

The CCC built the trails you’ll walk today

Between 1938 and 1942, workers from the Civilian Conservation Corps came to Walnut Canyon from a nearby camp at Mt. Elden. They quarried local stone and built the original visitor center by hand.

They lined the Island Trail with stone, built support walls along the canyon drop, stabilized crumbling cliff dwelling walls and put up ranger residences that still stand today.

President Woodrow Wilson had already set the place aside in 1915, when he proclaimed it a national monument on Nov. 30. It landed on the National Register of Historic Places in 1966.

Fewer crowds than the Grand Canyon, same ancient Southwest

Walnut Canyon draws a fraction of the visitors the Grand Canyon pulls in each year, and you feel that the moment you arrive. The trails don’t back up.

You can stand in front of a cliff dwelling and take your time without someone waiting behind you. Most people move through the museum, both trails and the overlooks in two to three hours.

If you want a full day, Walnut Canyon is one of three Flagstaff Area National Monuments managed together.

Sunset Crater Volcano and Wupatki share cultural ties to the same Indigenous peoples and sit within easy driving distance.

What stays with you after you leave the canyon

At nearly 6,700 feet, the canyon runs cooler than most of Arizona, which makes it a practical summer destination on top of everything else.

You can walk within arm’s reach of rooms where families slept, cooked and stored food 800 years ago, with no fence between you and the stone. The geology goes back 275 million years.

The plant life spans two climate zones.

Few places in the Southwest pack that much into such a compact area, and even fewer let you get this close to it without a crowd.

Visit Walnut Canyon National Monument in Arizona

To walk those cliff dwellings yourself, head to Walnut Canyon National Monument at Exit 204 off Interstate 40, about 10 miles southeast of Flagstaff.

The park runs from 8 a.m. to 5 p.m. from May through October, and 9 a.m. to 5 p.m. from November through April.

The Island Trail closes at 4 p.m. and the Rim Trail at 4:30 p.m. Admission runs $25 per vehicle, $20 per motorcycle, or $15 per person on foot or by bike for ages 16 and up. Children 15 and under get in free.

America the Beautiful, Senior, Military and Access passes are accepted. The park doesn’t take cash.

This article was created with AI assistance and human editing.

Read more from this brand:

• A 100-foot waterfall flows turquoise in Arizona and the only way in is on foot
• Arizona’s least-visited monument has more rock spires than you can count and trails you’ll have alone
• Walk deep enough into this Sedona canyon and a thousand-year-old village appears