The Culebra Range runs almost due north and south, with its northern limit at La Veta Pass in Colorado, and its southern limit at Costilla Creek, just south of Big Costilla Peak in New Mexico. Its highest point is Culebra Peak at , which is notable for being the only fourteener in Colorado which is on private land. Climbers wishing to ascend Culebra must pay a fee (currently US$100 per person), and the number of climbers per year is limited. It is also the most southerly fourteener in the U.S. Rockies. Standing to the east of the main crest are the two prominent Spanish Peaks (West: , East: ). These peaks were important landmarks on the mountain branch of the Santa Fe Trail.The bioregion receives very little water and has an annual precipitation of .This region is also home to the Culebra Micro-basin which has a rich agricultural history in the state of Colorado.