High Quality Content by WIKIPEDIA articles! Rabbit Ears is a pair of mountain peaks that were landmarks over the Cimarron Cutoff of the Santa Fe Trail. The Clayton Complex includes that, another mountain peak, and three camps between them: McNees Crossing, Turkey Creek Camp, and Rabbit Ears Camp. It was declared a National Historic Landmark in 1963. The Santa Fe Trail was a 19th-century transportation route through central North America that connected Missouri with Santa Fe, New Mexico. First used in 1821 by William Becknell, it served as a vital commercial and military highway until the introduction of the railroad to Santa Fe in 1880. At first an international trade route between the United States and Mexico, it was the 1846 U.S. invasion route of New Mexico during the Mexican American War.