NPS Photo / Jennette Jurado / Jennette Jurado A view of Mariscal Canyon in Big Bend National Park. CBP said in a statement the agency "has no plans for blasting of Mariscal Mountain in the Big Bend National Park." "I support strong border security, but it must be carried out responsibly and with respect for Big Bend National Park," Cuellar said. Courtesy / Raymond Skiles / Raymond Skiles Trucks bearing the logo of the Big Bend National Park border project contractor have arrived in towns across the region in recent days. Mary Cantrell contributed reporting from Big Bend National Park.