National Geographic : 1932 Jul
COLORADO, A BARRIER THAT BECAME A GOAL 27 Photograph by D. B. Walker DOWN SUCH TRAILS GOLD WORTH MILLIONS HAS COME BY MULEBACK The pack train was the only practicable means for transporting ore from inaccessible mines to mills and smelters in the early days of Colorado mining. Only extremely rich ore could yield a profit after such costly handling. Shafts to lower levels, wagon roads, and great cableways, which swing heavy ore buckets high above tree tops, have in large measure superseded pack-animal trans portation; but a few mines, notably the Camp Bird, near Ouray, still depend on the mule and his pack saddle. The pack train in the middle distance is descending Cornet Gulch, near Telluride, from the Liberty Bell Mine.