americasgreatoutdoors:

2,250 feet down, at the base of the Painted Wall – the tallest cliff in Colorado – the Gunnison River thunders through Black Canyon of the Gunnison National Park. You can actually hear the river roaring from the canyon rim. Several trails and overlooks along the rim offer stunning views of dramatic drops and the distant river. There are no maintained or marked trails into the inner canyon. Routes are difficult to follow, and only individuals in excellent physical condition should attempt these hikes. Photo by Nancy Danna (www.sharetheexperience.org).