The Whipple Mountains (Mojave: Avii Kur'utat; Chemehuevi: Wiyaatuʷa̱) are located in eastern San Bernardino County, California. They are directly west of the Colorado River, Parker Dam, and Lake Havasu; south of Needles, California; north of Parker, Arizona and Vidal, California; and northeast of Vidal Junction, California. The mountains were named after Amiel Weeks Whipple, a lieutenant in the US Army who surveyed the region in the 1840s, and later died in Chancellorsville in the Civil War.