SANTIAGO DRAW. Santiago Draw originates in numerous dry washes on the southern slopes of the Santiago Mountains to the west of Persimmon Gap in south central Brewster County (at 29°39' N, 103°11' W). From the upper reaches of its watershed, the draw drops some 700 vertical feet on a southeasterly course of five miles' length to its mouth on Bone Spring Draw just to the west of U.S. Highway 385, four miles southeast of the Persimmon Gap ranger station in Big Bend National Park (at 29°37' N, 103°09' W). The area through which Santiago Draw runs was once predominantly semiarid grassland, but intense grazing by livestock virtually destroyed the grasslands. Today much of the area has been reduced to barren hardpan, although it does support a scattered growth of creosote bush and other species characteristic of Chihuahuan Desert scrub. Along the lower reaches of the draw, which lie within the protection of the park boundaries, efforts by the National Park Service to restore the grasslands have met with some success.