Hikers descend the curving South Kaibab trail in Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A cowboy wrangler leads a pack train of horses up the South Kaibab Trail in Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Hikers on the South Kaibab Trail with the extensive Grand Canyon vista extending beyond, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

View of O'Neill Butte on the left and Grand Canyon on the right from the edge of Cedar Ridge along the South Kaibab Trail, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon view from Skeleton Point along the South Kaibab Trail on the south rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon view from the east side of Skeleton Point along the South Kaibab Trail, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Bright Angel Canyon viewed from Coconino Overlook along North Kaibab Trail on Grand Canyon North Rim, Arizona, United States of America, North America

Bright Angel Canyon viewed from Coconino Overlook along North Kaibab Trail on Grand Canyon North Rim, Arizona, United States of America, North America

Grand Canyon South Rim viewed from Cedar Ridge along the South Kaibab Trail, UNESCO World Heritage Site, Arizona, United States of America, North America

View of O'Neill Butte from its north side along the South Kaibab Trail at Grand Canyon Arizona just after sunrise.

View of O'Neill Butte from Yaki Point at first morning light, South Kaibab Trail, Bright Angel Canyon and Trail, Grand Canyon National Park, South Rim, Arizona, United States of America, USA

Suspension Bridge Kaibab Suspension Bridge over Colorado River, South Kaibab Trail, Grand Canyon National Park, Arizona, USA, North America

Female hiker waits for pack horses to pass on the South Kaibab Trail in Grand Canyon National Park north of Williams, Arizona May 2011. The South Kaibab Trail starts on the south rim of the Colorado Plateau and follows a ridge out to Skeleton Point allowing for 360-degree views of the canyon then down to the Colorado River. At the Colorado River the trail connects with the North Kaibab trail as part of the Arizona Trail system, that crosses the state of Arizona from Mexico to Utah.