1959 Map of Ringbolt Rapids

About this map

Black Canyon serves as the deep, winding centerpiece of this late 1950s survey, where the Colorado River carves through the boundary of Arizona and Nevada. Within the Lake Mead National Recreation Area, the river's treacherous character is documented through a series of named whitewater features, including Ringbolt Rapids, Cross Current Rapids, and Horseshoe Rapids. These navigational landmarks provide a detailed look at the river's profile before the downstream effects of modern water management fully altered the reach.