Nankoweap Trail is an unmaintained route on the North Rim of Grand Canyon National Park in Arizona, descending about 6,040 feet over 14 miles from the Saddle Mountain trailhead to Nankoweap Creek and continuing toward the Colorado River. Widely regarded as the canyon’s hardest trail, it is especially dangerous because no water is available for the 11 miles between the trailhead and the creek, forcing hikers to carry or cache supplies. The area is also linked to a 1996 tragedy in which a Boy Scouts group on a nearby off-trail ridge ran out of water; one member reached the river, but another died of heat exhaustion and dehydration.