Texas State Highway 142State Highway 142 is a short Texas state highway that runs from San [Marcos, Texas|San Marcos] to Lockhart.HistoryThe route was designated on December 16, 1929 along its current route. Prior to May 28, 2009, the route was located entirely within Caldwell [County, Texas|Caldwell County]. In that year, the SH 142 designation was extended into Hays County, concurrent with Texas State [Highway 80|SH 80], to a junction with Interstate [35 in Texas|Interstate 35].Major intersections