How big is lake livingston. Lake Livingston spans ~83,000 acres at a normal pool of 131 ft above mean sea level, with ~450 miles of shoreline across Polk, San Jacinto, Trinity, and Walker counties. For more fishing and lake information, visit our Lake Livingston page. Dam is in Polk and San Jacinto counties, west of Livingston and 50 miles north of Houston. Lake Livingston is the 2nd largest lake located fully inside Texas. You might catch catfish, crappie, bass or that kid favorite - perch. The lake extends over a vast surface area of 130 square miles (336 km²), with a maximum depth of 90 feet and an average depth of 23 feet. The lake is the largest lake constructed for water supply purposes located totally within the State of Texas. Mar 1, 1995 ยท Lake Livingston. Native emergent plants are limited to the upper areas of the reservoir and Lake Livingston, TX is located on the Trinity River in Polk, San Jacinto, Trinity and Walker counties and has a surface area of approximately 83,000 acres with a maximum depth of 77 feet. The park has three boat ramps, two fish cleaning stations, a fishing pier and bank fishing. bvsvle7eqscxzlnr41tfvtijk6dxkgcevzmk6x6nk6b0jst3