The Pedernales River ( PUR-də-NAL-iss) is a tributary of the Colorado River, approximately 106 miles (171 km) long, in Central Texas in the United States. It drains an area of the Edwards Plateau, flowing west to east across the Texas Hill Country west of Austin. The name "Pedernales", first used in the middle 18th century, comes from a Spanish word for the flint rocks characteristic of the riverbed.

Quelle: Wikipedia