The mountains of the Basin Range region, known in Texas as the Trans-Pecos Province, rise in Guadalupe Peak near the border of New Mexico, to nearly 9000 ft.
Half rises in a succession of scarps or steps to an elevation of 2500 ft., to the Great Plains region, which extends westward past the valley of the Pecos river.
Corner of the Trans-Pecos Province is a smaller plain known as the Stockton Plateau, but the remaining portion of this province is traversed from N.E.
The Rio Grande and its principal tributary, the Pecos, drain narrow basins in the S.W.; these two rivers and the Canadian river rise in the Rocky Mountains in Colorado and New Mexico, but all the other rivers by which the state is drained rise within its borders.
On the Llano Estacado there are both freshwater and salt lakes, and there are a few salt lakes in the Trans-Pecos Province and near the mouth of the Rio Grande on the Coastal Plain.
Of the Pecos Valley, and in the Staked Plain and Edwards Plateau; and the widely extending Lower Austral zone, covering most of the state and subdivided into the Lower Sonoran or arid western part, the Austroriparian, or humid eastern, and the narrow Gulf Strip, which is semi-tropical.
The peculiar plants of the Rocky Mountain plateaus penetrate into the Trans-Pecos region, which the north Mexican flora, including the Agave lecheguilla, a valuable commercial fibre, is found along the Rio Grande.
The upper slopes of some of the mountains in the Trans-Pecos region are clothed with forests of large pines, cedars and other trees.
Grasses representing several species also cover most of the Great Plains, the uplands in the southern portion of the Coastal Plain, and the treeless portions of the Prairie Plains and the Trans-Pecos region.
Flanks of the range, with ridges and valleys formed on their eroded edges and drained southward by the Pecos river to the Rio Grande and the Gulf of Mexico.
East of the city is the Pecos Forest Reserve, across which the Territory undertook the building, with convict labour, of a "scenic highway" from Santa Fe to Las Vegas.
East of the Pecos and S.
The stream next in importance is the Pecos river, which rises in Mora county and flows southward into Texas, where it joins the Rio Grande.
A little cotton has been grown near Carlsbad in the Pecos Valley, and in 1909 sugar beets were introduced south of Albuquerque and cantaloupes in the southern Rio Grande Valley.
Other systems contemplated by the government were the Las Vegas project for reclaiming 10,000 acres near Las Vegas, the Urton Lake project for reclaiming 60,000 acres in the Pecos Valley, and the La Plata Valley project for irrigating about 40,000 acres in the northwestern part of New Mexico, 35 m.
This system also controls the Pecos Valley & North-Eastern railway, which serves the southwestern part of New Mexico.
An exploring party sent eastward reached Acoma, and then proceeded to Tiguex on the Rio Grande, and finally to the Pecos river.
Carleton against the Navahos, who were subdued and placed on a reservation on the Pecos river, and later removed to the north-western part of the Territory.