It may seem unfruitful at this time to attempt a solution of the problem of John Colter’s 1807 route of discovery in Yellowstone. Many people require no proof of anything cited in the records of such great scouts as Jedediah S. Smith, Kit Carson, and John Colter. Their integrity need not be questioned. Still, it is within the province of the historian to sift and test all of the evidence until the truth falls into place as elements in a jigsaw puzzle. Even myths and legends should be examined for any implications and bearing they might have upon a fact. It is in this light that the following discussion of the Colter discovery problem is presented. This case is entirely hypothetical, since no specific reference to his route has been found anywhere among source material, except as it is approximated upon the Map of 1814.

Beyond the known facts of Colter’s journey in 1807, the Map of 1814, and the “Colter’s Hell” legend, there is a complete hiatus, or vacuum. However, the Map of 1814 is certainly a tangible thing; let it tell its own story: It is known that William Clark had a friend in Philadelphia named Nicholas Biddle who arranged for the publication of The Lewis and Clark Journals. In order to properly depict the journey, Mr. Biddle secured the services of a prominent Philadelphia cartographer named Samuel Lewis. Twice in 1810 Clark sent sheets of map material to Mr. Biddle.[352] John Colter reached St. Louis in May, 1810. It is certain that he called upon Clark and gave him information, if not sheets, depicting his famous journey of 1807. This data was undoubtedly sent on to Mr. Biddle, either as Colter drew it or as it was accurately redrawn by Clark. At least one of Colter’s sheets was incorporated in the final Map of 1814.[353] The first, or eastern prairie, side of the Colter plat traced his journey up Pryors Fork, about fifty miles west of Fort Manuel, through Pryors Gap. Then he crossed over to Clarks Fork, which he ascended, probably to Dead Indian Creek. From this creek Colter crossed over a divide to the North Fork Shoshone River where he first smelled sulphur. This he called Stinking Water River, most probably referring to the present De Maris Mineral Springs near Cody, Wyoming.

On Stinking Water River he encountered the “Yep-pe Band of Snake Indians 1000 souls.” This was evidently a clan of the Crow tribe. From these Yep-pe Indians, denizens of both prairie and mountain, he undoubtedly learned of the Yellowstone geysers and other marvels. This accounts for his side trip which brought him back to the Yep-pe camp. It is likely that some of these Indians directed Colter along another route in returning to Manuel’s Fort. Obviously they went down the North Fork Shoshone, or Colter’s Stinking Water River, to its junction with Shoshone River. This, he followed to Gap Creek (now Sage Creek) which he ascended to Pryors Gap.[354] By this alternate route Colter again reached Pryors Fork where he crossed over to return to Fort Manuel.

From this examination it is obvious that the western boundary of Colter’s first map lies east of 110° longitude, and up to that point no difficulty whatever is encountered with either the route or the map. This line undoubtedly defines the west border of Colter’s first sheet. It became a part of the Map of 1814 without change. Hence, it is a correct representation of the “Buffalo Bill country” around Cody, Wyoming. Published in 1814, it could only have been the work of John Colter, because no other white man had visited that area. Because of the accuracy of Colter’s first plat, or east portion of the map, his course to the Yep-pe Indian camp can be followed like tracks in the snow. Just so, the return route east of 110° can be identified as coming down Sunlight Creek and back up Dead Indian Creek to the Yep-pe Indian camp. From there he followed a shorter route, in returning to the eastern edge of the map sheet, that is to say, the head of Pryors Fork.

M. D. Beal
Yellowstone section of Colter’s route.

Logic and a reasonable sense of procedure would support this route as the trail of Colter’s Yellowstone Discovery. Conclusive proof is lacking.

Thus, it is evident that the eastern courses of Colter’s journey, both going and coming, are accurately depicted on the Map of 1814. East of 110° it is an accurate and authentic mapping of the area, just such a one as an intelligent trapper would make. Whatever is depicted corresponds to actual geography. It is factual, tangible, verifiable, and indisputable.

This part of the map proves that Colter did take an extended journey in a southwesterly direction, but it does not prove that he discovered Yellowstone Park. The dependable part of the map simply accounts for the eastern part of the figure eight which is essential to describe the complete journey.[355] The reliable part leads him only to the southeastern border of Yellowstone Park and brings him back from farther north along its eastern boundary.