Ayres Natural Bridge Park is a county park in Converse County, Wyoming in the United States. It occupies 150 acres (0.6 km²) between the towns Glenrock and Douglas about 6 kilometers south of Interstate 25 exit 151. The park's name is derived from the rock formation of the same name.
Over the course of millions of years, a bend in LaPrele Creek (originally known as Bridge Creek) wore away at a wall of solid rock, creating a natural opening. The creek eventually shifted course through the opening, forming a 30-foot (10 m) high and 50-foot (15 m) wide arch, today known as Ayres Natural Bridge.
Located about a mile (2 km) south of the Oregon Trail, the Natural Bridge was often visited by emigrants traveling west. It is considered one of Wyoming's first tourist attractions. In 1843, a pioneer…