[1] It drains part of the Edwards Plateau in Texas Hill Country northwest of Austin.

Continuing in an easterly direction, the river carves its way through the Llano Uplift, a roughly circular geologic dome of Precambrian rock, primarily granite, located in Central Texas.

As the legend goes, Miranda came across a cave in the side of a hill in the vicinity of the Rio de las Chanas (Llano River), and reported astounding quantities of silver to be found within.

[4] On October 9, 2018, a cold front swept through the hill country where it encountered the remnants of Hurricane Sergio.

[11] Lake Travis rose 25 feet in 24 hours and water flowed into it at a rate of 375,000 cfs.