Arco, Idaho
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Arco is a city in Butte County, Idaho, United States. The population was 879 as of the 2020 United States census, down from 995 at the 2010 census. Arco is the county seat and largest city in Butte County.
City office / Recreation Hall on Main Street in Arco
Snake River Plain
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The Snake River Plain is a geologic feature located primarily within the U.S. state of Idaho. It stretches about 400 miles (640 km) westward from northwest of the state of Wyoming to the Idaho-Oregon border. The plain is a wide, flat bow-shaped depression and covers about a quarter of Idaho. Three major volcanic buttes dot the plain east of Arco, the largest being Big Southern Butte.
The Snake River cutting through the plain leaves many canyons and gorges, such as this one near Twin Falls, Idaho
The eastern Snake River Plain, image from NASA's Aqua satellite, 2008
Moisture Channel
Natural vegetation on the Snake River Plain near Twin Falls