Pikes Peak (also sometimes referred to as Pike's Peak) is a mountain in the Front Range of the Rocky Mountains, 10 miles (16 km) west of Colorado Springs, Colorado, in El Paso County. It is named for Zebulon Pike, an explorer who led an expedition in the southern Colorado area and other parts of the newly acquired Louisiana Purchase in 1806. (Ironically, Pike himself never reached the summit of Pikes Peak.) At 14,115 feet (4302 m), it is one of Colorado's 54 fourteeners. Pikes Peak has been designated a National Historic Landmark.