The Lost Pines Forest is a 13-mile belt of loblolly pines in the U.S. state of Texas, near the town of Bastrop. The stand of pines is unique in Texas because it is a disjunct population of trees that is more than 100 miles separated from, and yet closely genetically related to, the vast expanse of pine trees of the Piney Woods region that covers parts of Texas, Arkā¦The Lost Pines Forest is a 13-mile belt of loblolly pines in the U.S. state of Texas, near the town of Bastrop. The stand of pines is unique in Texas because it is a disjunct population of trees that is more than 100 miles separated from, and yet closely genetically related to, the vast expanse of pine trees of the Piney Woods region that covers parts of Texas, Arkansas, Louisiana, and Oklahoma.