(Texas)
Big Bend Ranch State Park is a 311,000-acre (126,000 ha) state park located on the Rio Grande in Brewster and Presidio counties, Texas. It is the largest state park in Texas. The closest major town is Presidio, Texas. The state park's head office is located in Lajitas, Texas at the Barton Warnock Visitor Center. It includes Colorado Canyon. (Ref: https://en.wikipedia.org/wiki/Big_Bend_Ranch_State_Park)