History of Llano River in Timeline

By Popular Timelines Editorial Team · Updated: July 7, 2025

The Llano River, a 105-mile-long tributary of the Colorado River in Texas, drains a portion of the Edwards Plateau within the Texas Hill Country, northwest of Austin. It is a significant geographical feature of the region.

1935: Llano River record high

In 1935, the Llano River reached its record high level of 41.5 feet.

October 9, 2018: Cold front and Hurricane Sergio remnants cause flooding

On October 9, 2018, a cold front interacting with the remnants of Hurricane Sergio led to significant rainfall in Mason County (10 inches) and a rise in Lake Travis (3 feet). The flow rate in Junction, Texas, surged from 111 cfs to 118,000 cfs.

October 16, 2018: Hurricane Willa remnants and flooding in Llano

On October 16, 2018, the remnants of Hurricane Willa brought upwards of a foot of rain to Llano, Texas. The flow rate of the Llano River increased from 150 cfs to 275,000 cfs, cresting at 39.9 feet, its highest level in over 80 years, which caused the RM 2900 bridge in Kingsland to collapse.