Cimarron River

River rising in northeastern New Mexico, U.S., near Capulin Mountain National Monument and flowing 698 mi (1,123 km) to enter the Arkansas River near Tulsa, Okla. From its source, the Cimarron flows east past Black Mesa, a peak 4,973 ft (1,516 m) high, through the northern Oklahoma Panhandle and bends northward through the southeastern corner of Colorado and the southwestern corner of Kansas.