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The Eastern Plains are part of the High Plains, which are the westernmost portion of the Great Plains. The region is characterized by mostly rolling plains, divided by the South Platte River and Arkansas River valleys. There are also several deciduous forests, canyons, buttes, and a few large natural lakes and rivers throughout the region. The Eastern Plains rise from approximately 3,400 feet at the eastern border of Colorado with Kansas, where the Arkansas River leaves the state, to 7,500 feet east of the Denver Basin.
Most of the Eastern Plains region lies within Colorado's 4th congressional district.
The Eastern Plains have a semi-arid climate and receive little rainfall. Much of the area relies on irrigation to survive. Summers are typically hot and dry, often bringing thunderstorms, which are often severe, to the area, with some occasionally forming landspouts and tornadoes. Eastern Colorado winters are cold and dry, with significant snowfalls and icy conditions. Temperatures can sometimes fall to -40 to -30 degrees Fahrenheit in extreme cold waves, although this is rare.
Eastern Colorado was once home to many Native American tribes. The Plains Indians that lived in the region included the Arapahoe, Cheyenne, Kiowa, Pawnee, and Sioux. The Ute people formally ruled all over central and western Colorado, and onto the eastern plains as well. The Comanche once ruled all over southeastern Colorado, and the Jicarilla Apache ruled in southeastern Colorado as well.
The original settlers of Eastern Colorado were largely German immigrants who farmed in the area. Many of the family farms in the region are still operated by the descendants of these immigrants.
The Eastern Colorado plains are among the most sparsely populated areas in the continental United States. Some of the region, with the exception of comparatively urban areas like Sterling, is experiencing depopulation, which in some areas began with the influenza pandemic of 1918 and agricultural price collapses after World War I. The Dust Bowl devastated the region and further accelerated this outmigration. Kiowa County demonstrates the population decline and its associated effects.
Both the Pawnee National Grasslands and Comanche National Grasslands are located in the Eastern Plains. They are composed of marginal farmlands that were withdrawn from agriculture and consolidated under federal control beginning in the Dust Bowl.
Eastern Colorado is largely farmland, with many small farming communities. The major cash crops are corn, wheat, hay, oats, and soybeans. There is also significant livestock farming, dairy and poultry farming, including chicken for meat and eggs, and turkey farming. Most of the towns in the region have grain elevators and prominent water towers. Also, over 90% of the farms in Eastern Colorado are family farms.
In Eastern Colorado most small towns have their own schools and sports teams, but in some parts where depopulation has been the worst, a single school is shared among surrounding towns. There are also a number of schools serving students in grades K-12 run by religious groups or public school districts. Eastern Colorado is one of the few remaining places in the United States with still operating one room school houses.
Eastern Colorado roads span the gamut from paved roads to gravel roads to dirt roads. The unpaved roads are typically county or local roads that do not receive enough traffic to be paved. Some of the major paved roads include:
- U.S. Highway 6
- U.S. Highway 24
- U.S. Highway 36
- U.S. Highway 40
- U.S. Highway 50
- U.S. Highway 160
- U.S. Highway 287
- U.S. Highway 350
- U.S. Highway 385
- State Highway 10
- State Highway 11
- State Highway 36
- State Highway 59
- State Highway 71
- State Highway 86
- State Highway 94
- State Highway 96
- "Eastern Plains". Colorado State University. Retrieved December 5, 2007.
- "Pawnee National Grassland History". U.S. Department of Agriculture, Forest Service. March 24, 2004. Retrieved 2007-12-01.
- "Chronological History of National Grasslands" (PDF). U.S. Department of Agriculture, Forest Service. Retrieved 2007-12-05.
- Family farms