The Cimarron River, flowing entirely in New Mexico, was originally known as the Le Flecha. New Mexico ( is a state located in the southwestern region of the United States of America. It runs for 60 miles (97 km) from Eagle Nest Lake to below the city of Springer, New Mexico and is a tributary of the Canadian River, the southwesternmost major tributary flowing into the Mississippi River via the Arkansas River sub-basin. "Eagle Nest" redirects here For other uses see Eagle's Nest. Springer is a Town in Colfax County, New Mexico, United States. The Canadian River is the largest Tributary of the Arkansas River. The Mississippi River is the second longest River in the United States, with a length of from its source in Lake Itasca in Minnesota to The Arkansas River is a major Tributary of the Mississippi River. Near Philmont Scout Ranch, the first dozen miles of the Cimarron River (above Cimarron, New Mexico) are known for fine trout fishing. Cimarron is a Village in Colfax County, New Mexico, United States. Trout is the common name given to a number of Species of Freshwater Fish belonging to the Salmonidae family