National monument, western Nebraska, U.S. Established in 1919, it has an area of 5 sq mi (13 sq km). Its focus is a large bluff that rises 800 ft (244 m) above the North Platte River and was a prominent landmark on the Oregon Trail. A museum at the base of the bluff highlights the history of the pioneer travelers.
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According to the United States Census Bureau, the CDP has a total area of 22.6 square miles (58.7 km²), of which, 22.1 square miles (57.2 km²) of it is land and 0.6 square miles (1.4 km²) of it (2.43%) is water.
There were 135 households out of which 28.9% had children under the age of 18 living with them, 47.4% were married couples living together, 5.9% had a female householder with no husband present, and 44.4% were non-families. 35.6% of all households were made up of individuals and 5.2% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 3.25.
In the CDP the population was spread out with 25.9% under the age of 18, 8.8% from 18 to 24, 29.1% from 25 to 44, 25.6% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 102.5 males. For every 100 females age 18 and over, there were 104.3 males.
The median income for a household in the CDP was $23,906, and the median income for a family was $30,938. Males had a median income of $31,563 versus $14,792 for females. The per capita income for the CDP was $13,567. About 22.8% of families and 21.9% of the population were below the poverty line, including 27.7% of those under age 18 and 25.0% of those age 65 or over.