[DOC] [TLE] Rio Grande - Wikipedia [PAR] The Rio Grande is one of the principal rivers in the southwest United States and 
northern Mexico (the other being the Colorado River). The Rio Grande rises from 
south-central Colorado in the United States and flows to the Gulf of Mexico. Along 
the way, it forms part of the MexicoUnited States border. ... From there, it flows 
through the San Luis Valley, then south into New Mexico,... [DOC] [TLE] Sierra Madre Occidental - Wikipedia [PAR] The Sierra Madre Occidental is a major mountain range system of the North 
American ... The high plateau that is formed by the range is cut by deep river 
valleys. ... The range runs parallel to the Pacific coast of Mexico, from just south of 
the ... through eastern Sonora, western Chihuahua, Sinaloa, Durango, Zacatecas
, Nayarit... [DOC] [TLE] Southwestern United States - Wikipedia [PAR] The Southwestern United States is a region of the United States which includes 
Arizona, the ... The Chihuahuan Desert spreads across the southeastern portion 
of the .... He calls the first subregion "Northern New Mexico", and describes it as 
... the north stretching from the upper Canadian River to the upper San Juan 
River. [DOC] [TLE] Protecting the Chihuahuan Desert - BigBendChat [PAR] Mar 29, 2007 ... There are also river valleys, formed by the Rio Grande and the Pecos ... All of 
these indicator species disappear in Socorro, New Mexico. .... San Simon Valley 
of southeastern Arizona to an area just north of Mexico City. .... Ultimately, the 
Chihuahuan Desert stretches east into southern New Mexico and the... [DOC] [TLE] The Chihuahuan Desert - Digital Desert Library - New Mexico State ... [PAR] The Chihuahuan Desert is the easternmost, southernmost, and largest North ... of 
the Chihuahuan reach up into western Arizona, southern New Mexico, and Texas
, ... There are also river valleys, formed by the Rio Grande and the Pecos rivers, ... 
There is only one plant that is endemic to the Chihuahuan Desert - meaning... [DOC] [TLE] Desert Route To California - DesertUSA [PAR] It served as the crossing, not only for the desert route to California, but also for ... 
trails that forded the Pecos River north of the lower river crossing and south of ... 
The route that paralleled the Texas and New Mexico border was called the 
Upper Trail. ... At El Paso, the route to California merged with the Chihuahua Trail
, the... [DOC] [TLE] History & Significance - El Camino Real de Tierra Adentro National ... [PAR] The 1775 Templo de San Cayetano outside of Guanajuato, Mexico, is ... Land 
reaches 1,600 miles north from Mexico City to West Texas and New Mexico. ... 
states crosses deserts, rivers, mountains and more, from the lower El Paso Valley 
... and often-violent deaths that characterize El Camino Real's north-south 
narrative. [DOC] [TLE] All about Oscar - Britannica [PAR] From there the Mesa Central stretches to a point just south of Mexico City. ... In 
the north the Chihuahuan Desert covers a section of the plateau that is more ... 
The largest valleys rarely exceed 100 square miles (260 square km) in area, and 
many ... are cut by the Rio Grande but continue in New Mexico and western 
Texas),... [DOC] [TLE] Mexico | history - geography | Britannica.com [PAR] Aug 12, 2016 ... Mexico, country of southern North America and the third largest country in ... From 
there the Mesa Central stretches to a point just south of Mexico City. ... In the 
north the Chihuahuan Desert covers a section of the plateau that is more .... To 
the northwest and paralleling the coast is the Grijalva River valley. [DOC] [TLE] Chihuahuan Desert | Places | WWF [PAR] The Chihuahuan is the largest desert in North America-stretching all the way from 
the ... Mexico City and Santa Fe, New Mexico, is now home to five million people. 
... A border town just across the Rio Grande River from El Paso, Juarez,... [DOC] [TLE] Rio Grande - New World Encyclopedia [PAR] Jul 13, 2015 ... In Mexico the river is known as Ro Bravo or Ro Bravo

Question: The Chihuahuan Desert stretches from this river's valley in Southern New Mexico to just north of Mexico City
Answer: the Rio Grande