High Plains (United States)
High-elevation subregion of the Great Plains with semi-arid climate.
The High Plains are a subregion of the Great Plains, primarily located in the Western United States, though they extend into the Midwest states of Nebraska, Kansas, and South Dakota. This area occupies the western portion of the Great Plains, situated just east of the Rocky Mountains. Geographically, the High Plains cover eastern Montana, southeastern Wyoming, southwestern South Dakota, western Nebraska, eastern Colorado, western Kansas, eastern New Mexico, the Oklahoma Panhandle, and the Texas Panhandle. The southern part of this region includes the Llano Estacado, a distinct geological formation visible from a distance or in satellite imagery. Elevation increases from east to west, rising from approximately 1,500 feet to 6,000 feet.
Historically, the term "High Plains" was used in the 19th century to refer to the entire area now known as the Great Plains, which was then called the Great American Desert. The modern usage of "Great Plains" became widespread after Nevin Fenneman's 1916 study, *Physiographic Subdivision of the United States*; prior to that, the region was almost always called the High Plains, in contrast to the lower Prairie Plains of the Midwest. Today, "High Plains" denotes this specific subregion.
The climate is cold semi-arid (Köppen BSk), with annual precipitation between 10 and 20 inches. Low moisture and high elevation cause wide temperature extremes, including daily swings of about 30 °F and possible 24-hour shifts of 100 °F. A record event in Browning, Montana, saw a drop from 44 °F to -56 °F in one day. Steady westerly winds are common, adding significant wind chill in winter and supporting wind farm development. The region's anomalously high elevation is attributed to subduction of the Farallon plate, which forced water into the lower crust, converting dense minerals into lighter ones and increasing crustal volume by about one mile.
Typical flora includes shortgrass prairie, prickly pear cacti, scrub, and sagebrush steppe near the Rockies. Agriculture—cattle ranching and crops like wheat, corn, and sunflower—dominates the economy, relying on dryland methods or irrigation from the Ogallala Aquifer. Oil, natural gas, and wind energy also contribute, as seen in West Texas, where the ASARCO refinery in Amarillo has operated since 1924 using plentiful natural gas and water. The High Plains has one of the lowest population densities in
- Region
- Western and Midwestern United States
- Elevation range
- 1,500 to 6,000 ft (460 to 1,830 m)
- Climate
- Cold semi-arid (Köppen BSk)
- Primary economic activities
- Cattle ranching, wheat, corn, sunflower farming, petroleum, natural gas, wind energy
- Notable geological feature
- Llano Estacado (southern region)
Lore & Background
The term 'Great Plains' was not generally used before the early 20th century; in the 19th century the region was known as the Great American Desert. Today, 'High Plains' is usually used for a subregion instead of the whole of the Great Plains. The High Plains have a cold semi-arid climate, receiving between 10–20 inches of precipitation annually. Due to low moisture and high elevation, the region commonly experiences wide ranges and extremes in temperature. This is the world record for the greatest temperature change in 24 hours. The High Plains are anomalously high in elevation. An explanation has been proposed: as the Farallon plate was subducted into the mantle beneath the region, water trapped in hydrous minerals in the descending slab was forced up into the lower crust above, causing hydration of dense garnet into lower density minerals, raising the elevation by about one mile.
Reader's Guide
The High Plains are significant as a distinct physiographic subregion of the Great Plains, characterized by high elevation, aridity, and extreme temperature swings. Their historical naming—from 'Great American Desert' to 'High Plains' to a subregion of the 'Great Plains'—reflects evolving geographic understanding. The region's economy relies heavily on agriculture (cattle ranching, wheat, corn, sunflower) and extraction of petroleum, natural gas, and wind energy. Irrigation from the Ogallala Aquifer enables water-intensive crops like corn. The High Plains have one of the lowest population densities in the continental United States, with growth concentrated in west Texas cities like Amarillo and Lubbock, while smaller towns struggle. The region's unique geology—including the Llano Estacado and the proposed mechanism for its high elevation—adds to its scientific interest.
Did You Know?
- The High Plains rise in elevation from around 1,500 to 6,000 ft from east to west.
- The High Plains have a cold semi-arid climate (Köppen BSk) and receive between 10–20 inches of precipitation annually.
- The southern region of the Western High Plains ecology region contains the geological formation known as Llano Estacado.
Frequently Asked Questions
Who is High Plains (United States)?
The High Plains is a high-elevation subregion of the Great Plains stretching across the western U.S. and parts of the Midwest. It sits between the lower Great Plains to the east and the Rocky Mountains to the west, covering portions of eight states plus the Oklahoma and Texas Panhandles.
What are High Plains (United States)'s powers/role?
The region's economic output centers on cattle ranching, wheat and corn cultivation, sunflower farming, petroleum and natural gas extraction, and wind energy production. Its cold semi-arid climate and elevations ranging from 1,500 to 6,000 feet shape every aspect of local agriculture and industry.
How does High Plains (United States)'s story end?
The southern portion of the region terminates in the Llano Estacado, a vast elevated tableland in eastern New Mexico and the Texas Panhandle. Beyond that point the High Plains give way to lower-elevation terrain as the Great Plains continue eastward.
Why is High Plains (United States) important?
The region is significant for its combination of high elevation, sparse population, and a diverse resource economy spanning agriculture, fossil fuels, and renewable energy. It represents the transitional zone where the Great Plains rise before meeting the Rocky Mountain front.
Where does High Plains (United States) appear?
The High Plains span eastern Montana, southeastern Wyoming, southwestern South Dakota, western Nebraska, eastern Colorado, western Kansas, eastern New Mexico, the Oklahoma Panhandle, and the Texas Panhandle. It occupies the western segment of the broader Great Plains before the terrain climbs into the Rockies.
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