Utah is one of the Four Corners states, and is bordered by Idaho and Wyoming in the north; by Colorado in the east; at a single point by New Mexico to the southeast (at the Four Corners Monument); by Arizona in the south; and by Nevada in the west. It covers an area of 84,899 square miles (219,887 km²).

One of Utah's defining characteristics is the variety of its terrain. Running down the center of the state is the Wasatch Range, which rises to heights of about 12,000 feet (3,650 m) above sea level. Portions of these mountains receive more than 500 inches (12.7 m) of snow each year and are home to world-renowned ski resorts, made popular by the light, fluffy snow, which is considered good for skiing. In the northeastern section of the state, running east to west, are the Uinta Mountains, which rise to heights of 13,000 feet (3,950 m) or more. The highest point in the state, Kings Peak, at an elevation of 13,528 feet (4,123 m), lies within the Uinta Mountains.

At the western base of the Wasatch Range is the Wasatch Front, a series of valleys and basins that are home to the most populous parts of the state. The major cities of Ogden, Salt Lake City, Layton, West Valley City, Sandy, West Jordan, Orem, and Provo are located within this region, which stretches approximately from Brigham City at the north end to Nephi at the south end. Approximately 75% of the population of the state lies in this corridor, and urban sprawl continues to expand along the edges of these valleys.

Western Utah is mostly arid desert with a basin and range geology. Small mountain ranges and rugged terrain punctuate the landscape. However, the Bonneville Salt Flats are an exception, being comparatively flat as a result of once forming the lake bed of Lake Bonneville. Great Salt Lake, Utah Lake, Sevier Lake, Rush Lake and Little Salt Lake are all remnants of this ancient freshwater lake, which once covered most of the eastern Great Basin. West of the Great Salt Lake, stretching to the Nevada border, lies the Great Salt Lake Desert, the most arid area in Utah.

Much of the scenic southern landscape is sandstone, more specifically Kayenta sandstone and Navajo sandstone. The Colorado River and its tributaries wind their way through the sandstone, creating some of the most striking and wild terrain in the world. Wind and rain have also sculpted the soft sandstone over millions of years. Canyons, gullies, arches, pinnacles, buttes, bluffs, and mesas are the common sight throughout south-central and southeast Utah. This terrain is accentuated in protected parks such as Arches, Bryce Canyon, Canyonlands, Capitol Reef, and Zion national parks, Cedar Breaks, Grand Staircase-Escalante, Hovenweep, and Natural Bridges national monuments, Glen Canyon National Recreation Area (site of the popular tourist destination, Lake Powell), Dead Horse Point and Goblin Valley state parks, and Monument Valley, a popular photographic and filming site.

Utah from space. The state is known for its diversity in geology, climate, and ecosystems.Southwestern Utah is the lowest and hottest spot in Utah. It is known as Dixie because early settlers were able to grow limited amounts of cotton there. Beaverdam Wash in far southwestern Utah is the lowest point in the state, at an elevation of 2,000 feet (610 m). The northernmost portion of the Mojave Desert is also located in this area. Dixie is quickly becoming a popular recreational and retirement destination, and the population is growing rapidly. Just north of Dixie is the state's highest ski resort, Brian Head.

Eastern Utah is a high elevation area covered mostly by plateaus and basins. Economies are dominated by mining, oil and natural gas-drilling, ranching, and recreation. Much of eastern Utah is part of the Uintah and Ouray Indian Reservation. The Navajo Nation also extends into southeastern Utah. The most popular destination within eastern Utah is Dinosaur National Monument.

Francisco Vásquez de Coronado may have crossed into what is now southern Utah in 1540, when he was seeking the legendary Cíbola. A group led by two Catholic priests—sometimes called the Dominguez-Escalante Expedition—left Santa Fe in 1776, hoping to find a route to the California coast. The expedition traveled as far north as Utah Lake and encountered the native residents.

Fur trappers—including Jim Bridger—explored some regions of Utah in the early 1800s. The city of Provo was named for one such man, Étienne Provost, a Frenchman operating out of Santa Fe under Mexican license, who visited the area in 1825.

Mormon pioneers first came to the Salt Lake Valley on July 24, 1847. At the time, Utah was still Mexican territory. As a consequence of the Mexican-American War, the land became the territory of the United States upon the signing of the Treaty of Guadalupe Hidalgo, February 2, 1848. The treaty was ratified by the United States Senate on March 10. In 1850, the Utah Territory was created with the Compromise of 1850, and Fillmore was designated the capital. In 1856, Salt Lake City replaced Fillmore as the territorial capital.

Disputes between the Mormon inhabitants and the US Government intensified due to The Church of Jesus Christ of Latter-day Saints' practice of plural marriage among its members. The Mormons were pushing for the establishment of the State of Deseret. The U.S. Government, which was reluctant to admit a state the size of the proposed Deseret into the union, opposed the polygamous practices of the Mormons.

After news of their polygamous practices spread, the members of the LDS Church were quickly viewed as un-American and rebellious. In 1857, after news of a false rebellion spread, the government sent troops on the "Utah expedition" to quell the supposed rebellion and to replace Brigham Young as territorial governor with Alfred Cumming. The resulting conflict is known as the Utah War.

Because of the American Civil War, federal troops were pulled out of Utah Territory, leaving the territory in LDS hands until Patrick E. Connor arrived with a regiment of California volunteers in 1862. Connor established Fort Douglas just three miles (5 km) east of Salt Lake City and encouraged his men to discover mineral deposits to bring more non-Mormons into the state. Minerals were discovered in Tooele County, and miners began to flock to the territory.

Beginning in the early 1900s, with the establishment of such national parks as Bryce Canyon National Park and Zion National Park, Utah began to become known for its natural beauty. Southern Utah became a popular filming spot for arid, rugged scenes, and such natural landmarks as Delicate Arch and "the Mittens" of Monument Valley are instantly recognizable to most national residents. During the 1950s, '60s, and '70s, with the construction of the Interstate highway system, accessibility to the southern scenic areas was made easier.

The constitution of Utah was enacted in 1895. Notably, the constitution outlawed polygamy and continued the territorial practice of women's suffrage. Utah's Constitution has been amended many times since its inception. Utah is also one of only two states in the United States to outlaw all forms of gambling; the other is Hawaii. Utah is an alcoholic beverage control state. The Utah Department of Alcoholic Beverage Control regulates the sale of alcohol; wine and spiritous liquors may only be purchased at state liquor stores, and local laws may prohibit the sale of beer and other alcoholic beverages on Sundays.

Tourism is a major industry in Southern Utah, with Utah's five national parks (Arches, Bryce Canyon, Canyonlands, Capitol Reef, and Zion) and many other attractions. In Moab mountain biking is a popular sport. Research, information technology development, and service based industries are important economic activities along the Salt Lake City-Ogden-Provo corridor. Utah is also noted for its ski resorts, near Salt Lake City, Park City, Ogden, Provo, and Cedar City.