Pecos County, the second largest county in the state, is in southwest Texas, bordered on the east by Terrell County, on the south by Brewster County, on the west by Jeff Davis and Reeves counties, and on the north by Ward, Crane, and Crockett counties. The center of the county lies at 30°40' north latitude and 102°40' west longitude. Fort Stockton, the county seat, is seventy-five air miles southwest of Odessa. The area is named for the Pecos River, which flows along the northern boundary of the county. Pecos County covers 4,776 square miles and lies primarily in the Trans-Pecos physiographic region, which begins at the Pecos River. In the south and east the county has undulating to hilly terrain surfaced by dark and loamy soils over limestone; this part of the county is 90 percent exposed rock. The northern and western parts of the county have alkaline and loamy desert soils, with some clayey subsoils, over limestone bedrock. Elevations range from 2,500 to 4,000 feet above sea level, with the highest elevations found in the Glass Mountains, in the southwestern part of the county. The eastern and central portions of the county, on the edge of the Edwards Plateau, are marked by mesas of varying sizes with intervening arroyos. Hills become more rounded and valleys more pronounced further west. Most of the northern part of the county slopes toward the Pecos River, while terrain in the western sections is generally undulating. The Pecos River is the only major source of surface water in the county. It flows continuously, while other streams in the county flow only after infrequent torrential rains. Springs were at one time an important water source for the area, but because of heavy pumping of ground water, most major springs no longer flow. The average annual rainfall is thirteen inches. Temperatures range from an average low of 31° F in January to an average high of 96° F in July; the average growing season lasts 225 days. Pecos County land has short and sparse grasses with desert scrubs and cacti. In the southeast, slightly taller grasses, desert shrub, and scrubby live oaks are present. Deer, foxes, ring-tailed cats, sandhill cranes, doves, and ducks are some of the animals that roam the area. The agricultural sector of the county's economy revolves primarily around sheep ranching; cattle, angora goats, and hogs are also raised in the area. Though less than 1 percent of the county is considered prime farmland, crops grown in Pecos County include cantaloupes, carrots, bell peppers, onions, peaches, and pecans. Since the 1920s, however, oil and gas production have dominated the local economy. In 1990 26,650,000 barrels of crude oil were produced in the county; by January 1, 1991, almost 1,505,424,000 barrels of crude had been produced in the area since 1926.

Adapted from the official Handbook of Texas, a state encyclopedia developed by the Texas State Historical Association (TSHA). It is an authoritative source of trusted historical records.

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