Old Maverick Road Old Maverick Road runs between Maverick Junction and Santa Elena Canyon. It is a 14-mile improved dirt road that passes along the Terlingua Creek badlands on the west side of the park. A number of historic sites are located near the road that you may visit as you gradually descend to the Rio Grande and Santa Elena. While usually passable for most vehicles, this road tends to be rough and washboarded; the 14 miles takes around an hour to drive. This road is subject to high water and flooding following rainstorms.