formed in central Kimble County, approximately 4 mi (6 km) northwest of Junction, by the confluence of the North Llano and South
Llano rivers, both of which rise on the Edwards Plateau north of
Grande.It flows generally ENE across the Llano Uplift, a basin on the west edge of the
Hill Country, through rural Mason and Llano counties, passing north of Enchanted Rock and through the town of Llano.Northeast
of Llano it turns sharply to the southeast, joining the Colorado
from the northwest as an arm of Lake Lyndon B.Johnson, approximately 15 mi (24 km) southeast of Llano and
50 mi (80 km) northwest of Austin.