<P> Fountain Hills was developed by C.V. Wood, president of McCulloch Oil, and was named after the towering man - made fountain in the center of town . It was incorporated in 1989 . </P> <P> According to the United States Census Bureau, the town has a total area of 18.2 square miles (47.1 km), of which 18.1 square miles (46.9 km) is land and 0.1 square miles (0.26 km) (0.55%) is water . </P> <P> To the east of the town is the Verde River, a tributary to the Salt River . Inside the town there are many washes that run through Fountain Hills into the Verde River . Some of these washes include the Ashbrook, Balboa, Legend, and Colony Washes . During times of rain the washes flood with water and can sometimes block roads with their water . </P> <P> To the southwest and northwest regions of Fountain Hills are the McDowell Mountains, a chain of extinct volcanic mountains . The highest mountains in the range are East End (4,033 ft (1,229 m)) and Thompson Peak (3,910 ft (1,190 m)). </P>

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