“[This] richly documented book is the definitive study of the decisive role mountain men played in the exploration and expansion of the Western frontier.” —Jay P. Dolan, The New York Times Book Review Early in the nineteenth century, the mountain men emerged as a small but distinctive group whose knowledge and experience of the trans-Mississippi West extended the national consciousness to continental dimensions. Though Lewis and Clark blazed a narrow corridor of geographical reality, the West remained largely terra incognita until trappers and traders—such as Jim Bridger, Kit Carson, Tom Fitzpatrick, and Jedediah Smith—opened paths through the snow-choked mountain wilderness. These and other Mountain Men opened the way west to Fremont and played a major role in the pivotal years of 1845–1848 when Texas was annexed, the Oregon question was decided, and the Mexican War ended with the Southwest and California in American hands—thus making the Pacific Ocean America’s western boundary.

In 1807, a year after Lewis and Clark returned from the shores of the Pacific, groups of trappers and hunters began to drift West to tap the rich stocks of beaver and to trade with the Native nations. Colorful and eccentric, bold and adventurous, mountain men such as John Colter, George Drouillard, Hugh Glass, Andrew Henry, and Kit Carson found individual freedom and financial reward in pursuit of pelts. Their knowledge of the country and its inhabitants served the first mapmakers, the army, and the streams of emigrants moving West in ever-greater numbers. The mountain men laid the foundations for their own displacement, as they led the nation on a westward course that ultimately spread the American lands from sea to sea.

William H. Ashley, with his partner Andrew Henry, owned a fur trading company based in Saint Louis, Missouri. Prior to the period covered by these papers, he had lost a fortune in an ill-fated attempt to establish a trapping business on the upper Missouri river. His new plan was trap the region to the south, just over the divide. The previous year, an Ashley-Henry party led by Jedediah Smith had crossed the continental divide at what came to be known as South Pass and found the valley of the Green river to be rich with beaver. Consequently, the remainder of Ashley's fur company left St. Louis and made their way up the Platte. Ashley left two documents describing the events of 1825: One is what appears to be his field diary, containing daily entries. The other is a letter to Gen. Atkinson written after Ashley's return that fall, and contains a narrative of his 1825 season in the Rockies. These two documents are mostly consistent, although the narrative appears to have been written from memory because in some cases, details are different from those recorded in the contemporaneous diary. The diary was kept from March 25 to June 27, 1825. The diary commences on the Platte, just east of the continental divide. It describes the journey to the Green River and the division of the trapping party there. It also details Ashley's trip down the Green River in bullboats, and ends just a few days before Ashley's parties met on the Henry's Fork for the first Rocky Mountain Rendezvous. The narrative covers a longer period of time, from the time he left Ft. Atkinson on November 3, 1824 until he reached the Yellowstone below Big Horn Mountain on the 7th day of August, 1825. From there he proceeded downriver in boats with his rich cargo of furs, to the settlements.

William H. Ashley's expedition up the Missouri River in 1822 met with misfortunes that forced far-reaching changes in the fur-trading operations of the West. His claim to fame as an entrepreneur and explorer is clear in The Explorations of William H. Ashley and Jedediah Smith. Just as vivid is the story of the Bible-quoting Jedediah Smith, a member of Ashley's original expedition, who branched off into little-known regions, becoming the first American to reach California by an overland route. In his introduction, James P. Ronda supplies the historical context for their explorations. A professor of history at the University of Tulsa, he is the author of Lewis and Clark among the Indians (1984) and Astoria and Empire (1990).

With original primary source documents, this anthology brings readers into the vast unknown 19th-century American West—through the eyes of the explorers who saw it for the first time. This volume brings together book excerpts, maps, and illustrations from 12 explorers from the 19th century, highlighting their lives and contributions. Arranged chronologically, the 10 chapters focus on individual explorers, with biographies and background information about and document excerpts from each person. The chapters offer analyses of each document's relevance to the historical period, geographic knowledge, and cultural perspective. This guide shares the important contributions from explorers like Lewis and Clark, Zebulon Pike, Jedediah Smith, James P. Beckwourth, John C. Fremont, Susan Magoffin, and John Wesley Powell. It also nurtures readers' historical literacy by modeling historians' methods of analyzing primary sources. Readers will see new and familiar events from different perspectives, including that of a woman traveling along the Santa Fe Trail, one of the most famous African American mountain men, and a Civil War veteran, among many others.

The western fur trade era—a time when trappers and traders endured constant danger from man, beast, and weather—was one of the most colorful periods in American history. Over a decade ago, William R. Nester wrote the first biography of Robert Campbell (1804–1879); the subsequent discovery of nearly five hundred new documents, most from two major caches of letters, led to this even-more-detailed and vivid account of Campbell’s self-described “bold and dashing life.” Campbell came to America from Ireland in 1822 and entered the fur trade soon after. He quickly rose from trapper to brigade leader to partner, all within a half dozen years, and this new edition includes an expanded narrative of his adventures in the Rocky Mountain fur trade. In the mid-1830s, having amassed considerable wealth, Campbell retired from the mountains and embarked on a new career. He returned to St. Louis and built up a business empire that embraced mercantile, steamboat, railroad, and banking interests, thus becoming a leading force behind the region’s economic development. A more extensive account of the cutthroat business world in which Campbell operated now enriches this portion of the book. Nester masterfully depicts the “sterling character” for which Campbell was renowned. Campbell enjoyed deep and enduring friendships and strong familial ties, both in America and abroad. Although he was an outstanding businessman and philanthropist, his personal life was marred by tragedy. Ten of his thirteen children died prematurely. Despite those tragic losses, his faith in God never faltered. He believed that all worldly successes should honor God and once wrote that , “all worldly gain is but dross.” This edition elucidates the complex relations among his family and chronicles both tragic events and humorous incidents in more depth. Exploring the letters, journals, and account books that Campbell left behind, Nester places him in the context of the times in which he lived, showing the economic, political, social, and cultural forces that provided the opportunities and challenges that shaped his life. Nester provides new insights into Campbell’s ownership of slaves, his attitudes toward slavery, and his behind-the-scenes political and economic activities during the Civil War. This comprehensive exploration of Robert Campbell’s life depicts a fascinating era in American history.

Some vols. include supplemental journals of "such proceedings of the sessions, as, during the time they were depending, were ordered to be kept secret, and respecting which the injunction of secrecy was afterwards taken off by the order of the House."