Jedediah Strong Smith (January 6, 1799 – May 27, 1831) was an American clerk, transcontinental pioneer, frontiersman, hunter, trapper, author, cartographer, mountain man and explorer of the Rocky Mountains, the Western United States, and the Southwest during the early 19th century. After 75 years of obscurity following his death, Smith was rediscovered as the American whose explorations led to the use of the -wide South Pass as the dominant route across the Continental Divide for pioneers on the Oregon Trail.

Coming from modest family background, Smith traveled to St. Louis and joined William H. Ashley and Andrew Henry's fur trading company in 1822. Smith led the first documented exploration from the Salt Lake frontier to the Colorado River. From there, Smith's party became the first United States citizens to cross the Mojave Desert into what is now the state of California but which at that time was part of Mexico. On the return journey, Smith and his companions were likewise the first U.S. citizens to explore and cross the Sierra Nevada and the treacherous Great Basin Desert. The following year, Smith and companions were the first U.S. explorers to travel north from California overland to the Oregon Country. Surviving three Native American massacres and one bear mauling, Smith's explorations and documented travels were important resources to later American westward expansion.

Jedediah Smith

In March 1831, while in St. Louis, Smith requested of Secretary of War John H. Eaton a federally-funded exploration of the West, but to no avail. Smith informed Eaton that he was completing a map of the West derived from his own journeys. In May, Smith and his partners launched a planned paramilitary trading party to Santa Fe. On May 27, while searching for water in present-day southwest Kansas, Smith disappeared. It was learned weeks later that he had been killed during an encounter with the Comanche – his body was never recovered.

Jedediah Smith

After his death, Smith and his accomplishments were mostly forgotten by Americans. At the beginning of the 20th century, scholars and historians made efforts to recognize and study his achievements. In 1918, a book by Harrison Clifford Dale was published covering Ashley-Smith's western explorations. In 1935, Smith's summary autobiography was finally listed in a biographical dictionary. Smith's first comprehensive biography by Maurice S. Sullivan was published in 1936. A popular Smith biography by Dale Morgan, published in 1953, established Smith as an authentic national hero. Smith's map of the West in 1831 was used by the U.S. Army, including western explorer John C. Frémont, during the early 1840s.

Jedediah Smith

Early life

Smith was born in Jericho, now Bainbridge, Chenango County, New York, on January 6, 1799, to Jedediah Smith I, a general store owner from New Hampshire, and Sally Strong, both of whom were descended entirely from families that came to New England from England during the Puritan emigration between 1620 and 1640. Smith received adequate English instruction, learned some Latin, and was taught how to write decently. Around 1810, Smith's father was caught up in a legal issue involving counterfeit currency after which the elder Smith moved his family west to Erie County, Pennsylvania.

At age 13, Smith worked as a clerk on a Lake Erie freighter, where he learned business practices and probably met traders returning from the far west to Montreal. This work gave Smith an ambition for adventurous wilderness trade. According to Dale L. Morgan, Smith's love of nature and adventure came from his mentor, Dr. Titus G. V. Simons, a pioneer medical doctor who was on close terms with the Smith family. Morgan speculated that Simons gave the young Smith a copy of Meriwether Lewis' and William Clark's 1814 book of their 1804–1806 expedition to the Pacific, and according to legend Smith carried this journal on all of his travels throughout the American West. Smith provided Clark, who had become superintendent of Indian affairs, much information from his own expeditions to the West. In 1817, the Smith family moved westward to Ohio and settled in Green Township in what is present-day Ashland County.

Smith joins "Ashley's Hundred"