KERRVILLE, TEXAS. Kerrville, the county seat of Kerr County, is sixty-two miles northwest of San Antonio on Interstate Highway 10, at the junction of Texas Highways 16 and 27. The official elevation is 1,645 feet above sea level, though many of the residential districts in the hilly township are higher. Geography has always been the dominant quality of the Kerrville area-from prehistoric times, with archeological evidence suggesting human habitation as early as 10,000 years ago, to the present, when the town has achieved a national and international reputation for its karst landscapes, scenic roadways, river and streams, lakes, caves, biological diversity, ranches, architecture, and popular culture.