The Lava Falls Trail
in the Tuweep region of the Grand Canyon is one of the steepest and most strenuous paths in any national park, descending over 2,500 feet in 1.5 miles, partly down unstable slopes of scree and lava blocks - from the flat canyon rim, down to Lava Falls Rapids on the Colorado River. This is a very remote region, at least 65 miles from the nearest paved road, though is accessible to most vehicles during good weather conditions. Primitive camping is available at the nearby Toroweap Overlook.
1.5 miles (2.4 km), elevation change
2,540 feet (774 meters)