Yosemite's pack mules work together in a group called a string! Packers work with a specific string so that they can help each individual… | Instagram
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Shoshone mule pack from Wyoming provides assistance to Summit County bridge project | SummitDaily.com
![National Geographic on Instagram: “Photo by @dguttenfelder. A string of mules walk through Yellowstone Nationa… | Horses, Cowboy pictures, Yellowstone national park National Geographic on Instagram: “Photo by @dguttenfelder. A string of mules walk through Yellowstone Nationa… | Horses, Cowboy pictures, Yellowstone national park](https://i.pinimg.com/originals/5a/38/63/5a38636d26f1ef32c269ea67ebf6ff98.jpg)
National Geographic on Instagram: “Photo by @dguttenfelder. A string of mules walk through Yellowstone Nationa… | Horses, Cowboy pictures, Yellowstone national park
![Historique Grand Canyon- mule String à Phantom Ranch d'huile carburant DERNIÈRE MULE TRAIN ENTRANT PHANTOM RANCH QUE L'ÉLECTRICITÉ SOUS TENSION. 13 JUIL 1967. ERVIN Photo Stock - Alamy Historique Grand Canyon- mule String à Phantom Ranch d'huile carburant DERNIÈRE MULE TRAIN ENTRANT PHANTOM RANCH QUE L'ÉLECTRICITÉ SOUS TENSION. 13 JUIL 1967. ERVIN Photo Stock - Alamy](https://c8.alamy.com/compfr/m5eh2b/historique-grand-canyon-mule-string-a-phantom-ranch-d-huile-carburant-derniere-mule-train-entrant-phantom-ranch-que-l-electricite-sous-tension-13-juil-1967-ervin-m5eh2b.jpg)
Historique Grand Canyon- mule String à Phantom Ranch d'huile carburant DERNIÈRE MULE TRAIN ENTRANT PHANTOM RANCH QUE L'ÉLECTRICITÉ SOUS TENSION. 13 JUIL 1967. ERVIN Photo Stock - Alamy
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