Isom Dart ~ A Black Cowboy It seems history has conspired against the many cowboys of color. Isom Dart is one of those black cowboys whose adventures are often left untold. Born a slave in Arkansas and later freed by the Civil War he rode West. His pursuits ranged from rodeo rider to cattle rustler. His life came to an abrupt end when he was shot down in Cold Springs, Colorado by an unknown assailant on October 3, 1900. #Black_History.