Lake Lyndon B. Johnson is a reservoir on the Colorado River in the Texas Hill Country about 45 miles northwest of Austin. The reservoir was formed in 1950 by the construction of Granite Shoals Dam by the Lower Colorado River Authority (LCRA). The Colorado River and the Llano River meet in the northern portion of the lake at Kingsland.

The Llano River is a tributary of the Colorado River, about 105 miles (169 km) long, in Texas in the United States. It drains part of the Edwards Plateau in Texas Hill Country northwest of Austin.