The Ute Indians had known the canyon to exist for a long time before the first Europeans saw it. They referred to the river as "much rocks, big water," and are known to have avoided the canyon out of superstition. By the time the United States declared independence in 1776, two Spanish expeditions had passed by the canyons. In the 1800s, the numerous fur trappers searching for beaver pelts would have known of the canyon's existence but they left no written record. The first official account of the Black Canyon was provided by Captain John Williams Gunnison in 1853, who was leading an expedition to survey a route from Saint Louis and San Francisco. He described the country to be "the roughest, most hilly and most cut up," he had ever seen, and skirted the canyon south towards present-day Montrose. Following his death at the hands of Ute Indians later that year, the river that Captain Gunnison had called the Grand was renamed in his honor.