[Illustration: THE RIO GRANDE—The Big Bend of the Rio Grande provides the Southern boundary of Big Bend National Park. Within the park boundary, the river courses through three spectacular canyons: Santa Elena, Mariscal and Boquillas.] [Illustration: OAK CREEK CANYON—The trail to the “Window” descends into this chasm where the towering mountain masses dwarf the figures of men.] [Illustration: PINNACLES AND CANYONS OF PULLIAM MOUNTAIN—Many unique and interesting rock formations have been created by the erosive action on Pulliam Mountain.] [Illustration: CORRAL—Located in the center of the Chisos Basin, the corral depicts a true western atmosphere. Saddle horses are available for short rides or all day trips into the mountains.] Boquillas, located in the eastern section of the park, is also accessible by automobile. The Rio Grande area retains much of the frontier atmosphere of Texas and Mexico. Farther east near the Boquillas Canyon, Mexico’s Sierra del Carmen Range stands bold and magnificent, one of the most beautiful and inspiring sights of the Park. [Illustration: PANORAMA FROM THE SOUTH RIM—Sheer perpendicular cliffs drop more than 1,000 feet from the Rim, sloping into the foothills of the Lower Chisos. Beyond the Rio Grande, in the middle distance, lies the varied terrain of Mexico.] Numerous evening activities provide fun and entertainment for the Park visitor. National Park Service Naturalist and Rangers interpret the natural features and historical background of Big Bend around a campfire circle or in the ranger station. [Illustration: SANTA ELENA CANYON—Perpendicular walls of the Canyon rise more than 1500 feet above the Rio Grande. Mexico is on the left, the United States on the right.] Far removed from the conventional world, there is a certain friendliness of the Big Bend country that depicts an atmosphere of the old frontier. Devoid of any pretentions, the community high in the Chisos Mountains greets the traveler with the genuine hospitality of the southwest, where informality is the keynote to pleasant living. [Illustration: From the Lost Mine Peak Trail ridges and valleys unfold in a striking panorama of mountain scenery.] [Illustration: TRAIL RIDERS AT THE SOUTH RIM—Climaxing the scenery along the South Rim Trail is the spectacular vista from the Rim itself. In the distance, the Sierra del Carmen range is visible in Mexico.] In Big Bend National Park nature rules supreme. Untamed mountains and canyons flaunt a challenge to the adventuresome traveler. Undefiled and unblemished by the annals of time, Big Bend retains its scenic treasures for those who would prospect on the “Last Frontier.”