THIS DOESN’T SLOPE… IT DROPS 2,700 FEET STRAIGHT DOWN At Black Canyon of the Gunnison National Park, the ground doesn’t ease into the canyon. It drops nearly 2,700 feet straight down. The walls are so steep and close that sunlight barely reaches the bottom. It looks wrong at first, because it is different. Colorado geography Black Canyon of the Gunnison Colorado national parks deep canyon Colorado steep canyon walls Gunnison River canyon Colorado extreme landscapes narrow canyon Colorado canyon