Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Grand Canyon National Park' has mentioned 'River' in the following places:
Occurrence Sentence Text Source
The North Kaibab Trail can be followed all the way down to the Colorado River, connecting across the river to the South Kaibab Trail and the Bright Angel Trail, which continue up to the South Rim of the Grand Canyon.
Criterion (ix): Grand Canyon is an exceptional example of biological environments at different elevations that evolved as the river cut deeper portraying five of North Americaxe2x80x99s seven life zones within canyon walls.
Unique cultural adaptations made by diverse cultural groups over millennia xe2x80x94such as establishing travel routes from river to rim, high elevation farming, and using varied microenvironments seasonally across the regionxe2x80x94nurtured life in the rugged, remote Grand Canyon.