The Lamar Boulevard Bridge is a historic bridge over Lady Bird Lake in downtown Austin, Texas. The bridge features six open spandrel concrete arches, the length of the largest span is 109.9 ft. and the total length is 659.2 ft. Completed in 1942, the Lamar Boulevard Bridge was the second permanent bridge in Austin to cross the Colorado River after the Congress Avenue Bridge. The bridge was added to the National Register of Historic Places on July 7, 1994.