The central region of Texas covers the state's three largest cities: Houston, Dallas-Fort Worth and San Antonio. The limestone terrain of Texas Hill Country lies in Central Texas, as do the state's three largest rivers, the Trinity, the Brazos and the Colorado. A total of almost 100,000 acres were listed for sale in Bosque County recently; the value of all Bosque County farms, ranches, hunting land and other land for sale was $205 million. Bosque County ranks 98th out of 254 counties in the state for the total acreage of land currently advertised for sale. Among cities in Bosque County with farms, ranches, hunting land and other land for sale, Clifton had the most land for sale. Its economy is defined as agricultural, with 1,265 farms recorded in the county during the most recent U.S. Census. Farming activities in Bosque County generate annual revenues of $4 million, most of which is from crops. Bosque County is the 81st largest county (1,002 square miles) in Texas. It's located in the Blacklands North Texas region of the state.