Following guidance from the White House, Centers for Disease Control and Prevention (CDC), the U.S. Public Health Service, and Texas State Health Services, the Big Bend National Park and State Parks in Big Bend and Ft. Davis will begin the phased reopening of as early as June.
https://www.nps.gov/bibe/learn/news/big-bend-makes-plans-for-a-phased-reopening.htm
