Yuma County is a county in the southwestern corner of the U.S. state of Arizona. As of the 2020 census, its population was 203,881. The county seat is Yuma.
The Estrella Mountains or The Sierra Estrella is a mountain range located southwest of Phoenix, Arizona. Much of the range falls within the Gila River Indian Reservation, but 14,400 acres (5,800 ha) of BLM land is protected as the Sierra Estrella Wilderness.
Pilot Butte is a lava dome that was created from an extinct volcano located in Bend, Oregon. It is a cinder cone butte which rises nearly 500 feet (150 m) above the surrounding plains. Bend is one of six cities in the United States to have a volcano within its boundaries. The other examples are Mount Tabor in Portland, Oregon, Jackson Volcano in Jackson, Mississippi, Diamond Head in Honolulu, Glassford Hill in Prescott Valley and Pilot Knob in Austin, Texas.
Roof Butte is a peak in the Chuska Mountains in Arizona, United States. Roof Butte is the highest peak of the Chuska Mountains which run in a north-northwest direction across the Arizona-New Mexico border. Roof Butte is a visible butte for miles around. The butte has an elevation of 9,787 feet (2,983 m). A manned-lookout tower is located on Roof Butte. Two funnel shaped explosion volcanic pipes formed the flattish summit of Roof Butte, and a low lava dome caps one nearby peak.
The Kofa Mountains of Yuma and La Paz counties in Arizona is the central mountain range of the Kofa National Wildlife Refuge. The range lies about 60 miles northeast of Yuma in the southwestern part of the state. Kofa Wilderness takes up 547,719 acres of the refuge, making it the second largest wilderness area in Arizona. The equally extensive Castle Dome Mountains comprise the southern refuge border; the western end of the Tank Mountains are in the southeast of the wildlife refuge, and the New Water Wilderness in the New Water Mountains ends the extension of the Kofa National Wildlife Refuge to the north. Scenic "King Valley" is south of the Kofa Mountains between the Castle Dome Mountains.
The Tinajas Altas Mountains are an extremely arid northwest–southeast trending mountain range in southern Yuma County, Arizona, approximately 35 mi southeast of Yuma, Arizona. The southern end of the range extends approximately one mile into the northwestern Mexican state of Sonora on the northern perimeter of the Gran Desierto de Altar. The range is about 22 mi in length and about 4 mi wide at its widest point. The highpoint of the range is unnamed and is 2,766 feet above sea level and is located at 32°16'26"N, 114°02'48"W. Aside from the portion of the range in Mexico, the entirety of the range lies within the Barry M. Goldwater Air Force Range. They lie at the heart of the traditional homeland of the Hia C-eḍ O'odham people.
The Muggins Mountains is a mountain range in southwest Arizona east of Yuma, Arizona, northeast of the Gila Mountains, and east of the Laguna Mountains. The Castle Dome Mountains lie to the northeast across the broad Castle Dome Plain. The Muggins Mountains Wilderness occupies the southwest portion of the range.
The Tank Mountains are a mountain range in the Sonoran Desert of southwest Arizona; the range is part of the southeastern border of the Kofa National Wildlife Refuge.
The Gila Mountains of Yuma County are a 26-mile (42 km) long mountain range in southwestern Arizona in the northwest Sonoran Desert.
Arizona is a landlocked state situated in the southwestern region of the United States of America. It has a vast and diverse geography famous for its deep canyons, high- and low-elevation deserts, numerous natural rock formations, and volcanic mountain ranges. Arizona shares land borders with Utah to the north, the Mexican state of Sonora to the south, New Mexico to the east, and Nevada to the northwest, as well as water borders with California and the Mexican state of Baja California to the southwest along the Colorado River. Arizona is also one of the Four Corners states and is diagonally adjacent to Colorado.
The Castle Dome Mountains are a mountain range in Yuma County, Arizona, within the Kofa National Wildlife Refuge. Castle Dome Peak, the high point of the range, is a prominent butte and distinctive landmark. The peak is 3,780 feet (1,152 m) high, and is located at 33°05′04″N 114°08′36″W. Castle Dome was named by American soldiers at old Fort Yuma in the 1880s. Early Spanish explorers called the same peak Cabeza de Gigante, "Giant's Head."
Castle Dome Landing, Arizona is a ghost town in the Castle Dome Mountains of Yuma County in the U.S. state of Arizona. It was first settled as a transport depot and mining camp around 1863 in what was then the Arizona Territory.
El Camino del Diablo, also known as El Camino del Muerto, Sonora Trail, Sonoyta-Yuma Trail, Yuma-Caborca Trail, and Old Yuma Trail, is a historic 250-mile (400 km) road that passes through some of the most remote and inhospitable terrain of the Sonoran Desert in Pima County and Yuma County, Arizona. The name refers to the harsh, unforgiving conditions on the trail.
The Laguna Mountains are a small, approximately circular mountain range of extreme southwest Arizona northeast of Yuma and east of Winterhaven, California on the Colorado River. The Colorado forms the western perimeter of the mountains; Mittry Lake, on the Colorado is on its northwest.
Steamboats on the Colorado River operated from the river mouth at the Colorado River Delta on the Gulf of California in Mexico, up to the Virgin River on the Lower Colorado River Valley in the Southwestern United States from 1852 until 1909, when the construction of the Laguna Dam was completed. The shallow draft paddle steamers were found to be the most economical way to ship goods between the Pacific Ocean ports and settlements and mines along the lower river, putting in at landings in Sonora state, Baja California Territory, California state, Arizona Territory, New Mexico Territory, and Nevada state. They remained the primary means of transportation of freight until the advent of the more economical railroads began cutting away at their business from 1878 when the first line entered Arizona Territory.
George A. Johnson & Company was a partnership between three men who pioneered navigation on the Colorado River. Benjamin M. Hartshorne, George Alonzo Johnson and Alfred H. Wilcox. The George A. Johnson & Company was formed in the fall of 1852, and was reorganized as the Colorado Steam Navigation Company in 1869.
