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Walnut Canyon National Monument
IUCN Category III (Natural Monument)
Walnut Canyon National Monument is located in Arizona
Walnut Canyon National Monument
Walnut Canyon National Monument
Location in Arizona
Walnut Canyon National Monument is located in the United States
Walnut Canyon National Monument
Walnut Canyon National Monument
Location in the United States
Location Coconino County, Arizona, United States
Nearest city Flagstaff, Arizona
Area 3,529 acres (14.28 km2)
Created November 30, 1915 (1915-November-30)
Visitors 167,736 (in 2018)
Governing body National Park Service
Website Walnut Canyon National Monument
Walnut Canyon National Monument
Nearest city Flagstaff, Arizona
Area 2,249.5 acres (910.3 ha)
NRHP reference No. 66000174
Added to NRHP October 15, 1966

Walnut Canyon National Monument is a special protected area in the United States. It is located about 10 mi (16 km) southeast of Flagstaff, Arizona. The canyon rim is 6,690 ft (2,040 m) high, and the canyon floor is 350 ft (110 m) lower.

This monument protects ancient cliff dwellings. These homes were built by the Sinagua people. They lived in Walnut Canyon from about 1100 to 1250 AD. You can walk a 0.9 mi (1.4 km) trail that goes down 185 ft (56 m) into the canyon. Along this trail, you will see 25 cliff dwelling rooms. Other places where the Sinagua lived are nearby. These include Tuzigoot and Montezuma Castle.

Exploring the Sinagua People's Past

Walnut canyon cliff dwellings
Cliff dwellings in Walnut Canyon

The Sinagua people lived in a very dry area. Their name, "Sinagua," means "without water" in Spanish. They were very good at saving water. They also knew how to survive during droughts.

Who Were the Sinagua?

The Sinagua were also active traders. Their trading reached far places. They traded with people as far away as the Gulf of Mexico. Some of their trade even went to Central America.

The Mystery of Why They Left

The Sinagua people who lived in Walnut Canyon left around 1250 AD. No one knows for sure why they left. Some think they left because of droughts. Others believe they feared nearby tribes. They left behind more than 80 cliff dwellings.

How the Cliff Dwellings Were Built

The Sinagua built their homes under natural rock ledges. These ledges were deep inside the canyon. Water had slowly worn away the limestone cliffs over millions of years. This created perfect spaces for homes. They built these homes between 1125 and 1250 AD.

The dwellings were small. But they were big enough for families to cook and sleep. Most of these rooms are close to the loop trail. A typical room was about two meters high. It was also six meters long and three meters deep. One family likely lived in each room.

Water and Life in the Canyon

Water in the canyon was very important. It was essential for the Sinagua people 700 years ago. It is still important for plants and animals today. Walnut Canyon has many different plants. There are over 387 plant species here. These include the Prickly Pear cactus. You can also find the Arizona Black Walnut tree. The rich plant life likely helped the Sinagua decide to live here.

Panorama of the southern cliff dwellings at Walnut Canyon National Monument
A wide view of southern cliff dwellings not open to visitors

Protecting the Ancient Homes

President Woodrow Wilson made Walnut Canyon a national monument. This happened on November 30, 1915. He wanted to protect the old cliff dwellings. The monument was first managed by the USDA Forest Service. It was then moved to the National Park Service in 1933. The monument was added to the National Register of Historic Places in 1966. Visitors can walk on trails to see the dwellings up close.

Understanding Walnut Canyon's Geology

Walnut canyon strata
The different rock layers: Kaibab Limestone, Toroweap Formation, and Coconino Sandstone

Walnut Canyon is part of the Colorado Plateau. The canyon cuts through different layers of rock. These layers are called Permian Kaibab Limestone, Toroweap Formation, and Coconino Sandstone. The Kaibab Limestone also forms the rim of the Grand Canyon. You can see interesting patterns in the Coconino Sandstone. These patterns are called Crossbedding.

The Canyon's Creator: Walnut Creek

Walnut Creek flows through the canyon. It carved the canyon 600 ft (180 m) deep. The creek flows east and joins the Little Colorado River. This river then flows into the Grand Canyon. The creek also helps many different plants grow here.

Plants of the Canyon

The canyon walls have different types of plants. Shady, north-facing walls have fir and ponderosa pine trees. Sunny, south-facing slopes have agaves and several types of cactus. These include opuntia, echnocereus, and cholla. The bottom of the canyon has several kinds of walnut trees. This is how the canyon got its name!

The Canyon's Rock Layers

The canyon walls have three main rock layers.

Many layers of the limestone wore away over time. This created natural caves or alcoves. The Sinagua people used these alcoves as their homes. Today, about 3600 acres of land are protected here. This area preserves both ancient history and nature.

Walnut Canyon's Climate

Not all of Arizona is a hot, dry desert. Walnut Canyon is 6,690 ft (2,040 m) above sea level. This means it gets snow in winter. Summers are hot with afternoon thunderstorms. Spring often brings strong, gusty winds. Even with this changing weather, the Sinagua people grew food. They harvested maize (corn), beans, and squash.

Climate data for Walnut Canyon N.M. (1981–2010 normals)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °F (°C) 45.1
(7.3)
47.9
(8.8)
54.6
(12.6)
61.4
(16.3)
71.7
(22.1)
81.5
(27.5)
85.0
(29.4)
81.5
(27.5)
77.2
(25.1)
66.4
(19.1)
54.7
(12.6)
45.3
(7.4)
64.4
(18.0)
Mean daily minimum °F (°C) 17.2
(−8.2)
22.4
(−5.3)
26.6
(−3.0)
32.7
(0.4)
41.3
(5.2)
49.0
(9.4)
56.7
(13.7)
54.3
(12.4)
46.6
(8.1)
33.9
(1.1)
26.5
(−3.1)
18.3
(−7.6)
35.5
(1.9)
Average precipitation inches (mm) 1.79
(45)
1.67
(42)
1.58
(40)
1.03
(26)
0.52
(13)
0.37
(9.4)
2.43
(62)
3.32
(84)
2.04
(52)
1.18
(30)
1.36
(35)
1.53
(39)
18.82
(477.4)
Average snowfall inches (cm) 14.5
(37)
13.5
(34)
9.9
(25)
5.9
(15)
0.3
(0.76)
0
(0)
0
(0)
0
(0)
0
(0)
0.9
(2.3)
4.3
(11)
9.5
(24)
58.7
(149)
Average precipitation days (≥ 0.01 inch) 6.2 5.9 6.1 4.6 3.8 2.8 11.1 12.8 7.5 5.2 4.3 5.7 75.8
Average snowy days (≥ 0.1 inch) 3.6 4.1 3.1 1.7 0.2 0 0 0 0 0.4 1.6 3.6 18.3
Source: NOAA

Visiting Walnut Canyon National Monument

Walnut Canyon National Monument 2015 112
The Visitor Center

The park entrance road, trails, and Visitor Center are open all year. The only day they are closed is December 25. From May to October, the monument is open from 8:00 a.m. to 5:00 p.m. MST. For the rest of the year, it is open from 9:00 a.m. to 5:00 p.m. MST. Make sure to enter the park trails at least one hour before closing time.

How to Get There

Walnut Canyon is close to Flagstaff. It is 7 mi (11 km) east of I-40. Take exit 204 and go 3 mi (4.8 km) south. The park has a museum and a small visitor center. These are located high up on a cliff.

What to See at the Monument

Many ancient dwellings are built around a U-shaped bend in the canyon. Here, the creek almost circles a high rocky plateau. This area is the main attraction of the national monument. There are other ruins nearby that are not open to the public. You can also see other Sinagua dwellings at the Tuzigoot and Montezuma Castle monuments.

The Old Headquarters building at Walnut Canyon is also a historic site. It is listed on the National Register of Historic Places.

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