About 2,000 acres of thick, brushy growth, typical of Valley before agricultural development. Preserves and protects abundant wildlife and plant species, many found nowhere else in U.S. Rare birds prominent during winter season. Interpretive wildlife tram rides operate late Nov. - mid-Apr.; fee. Private cars use 7-mile wildlife drive on days when tram isn't operating. Walk-through access any time during daylight hours. Three self-guided nature walks; one for wheelchairs. Visitor center open weekdays 8 a.m. - 4:30 p.m.; weekends 9 a.m. - 4:30 p.m. (closed federal holidays). Entrance 0.4 mile east of U.S. 281/F.M. 907 intersection, some 7.5 miles south of Alamo.
