The elevation of a city is the term given to how high it is above mean sea level. In the case of Boise, Idaho, the city has an elevation of 2,730 ft (830 m), which is relatively high for an American city. Many major cities around the United States are located in coastal areas and have very low elevations. New York City, for example, has an elevation of only 33 feet (10 m), while Los Angeles has an elevation of 285 feet (87 m) and Chicago has an elevation of 594 feet (181 m). This means that most United States citizens live at relatively low elevations, but residents of Boise, Idaho, are much higher up than the average.
In terms of mean elevation, Idaho is one of the highest states in the United States, trailing only Colorado, Wyoming, Utah, New Mexico, and Nevada in this geographical statistic. The state of Idaho has a mean elevation of 5,000 feet (1520 m), so the city of Boise is well below the state's mean reading. The highest point in all of Idaho is Borah Peak, a mountain in the Lost River Range, which has an elevation of 12,668 feet (3,861 m), while the lowest point in the state is the confluence point of the Clearwater River and Snake River, which has an elevation of 713 feet (217 m).
The highest city in the state of Idaho is Island Park, located in Fremont County, which has an elevation of 6,290 feet (1,917 m). As well as Boise, other major cities in Idaho include Twin Falls, which has an elevation of 3743 feet (1141 m), and Coeur d'Alene, which has an elevation of 2188 feet (667 m), so the city of Boise, Idaho isn’t the highest or the lowest major city in the state when speaking about elevation.