The 1863 Yellowstone Expedition:

Gold, Bloodshed, and an Accidental Fortune in the Rockies

Origins in a Restless Gold Camp

By the spring of 1863, the mining camp of Bannack, tucked into the folds of southwestern Montana, had grown from a scattering of tents into a rough town of more than a thousand people. Gold had been discovered on Grasshopper Creek in July 1862, and the find transformed the area into what would soon become the first territorial capital of Montana. News of the strike, arriving amid the distractions of the Civil War, nonetheless drew fortune seekers west, and by early 1863 prospectors were fanning out across the surrounding drainages in search of the next rich gulch. Bannack's success was not an endpoint but an appetite. Men who had already found modest pay dirt on Grasshopper Creek began looking farther afield, toward country few white men had entered: the headwaters of the Yellowstone and Bighorn rivers.

Among those organizing a push into that country was James Stuart, a Gold Creek prospector who, with his brother Granville, had made one of the earliest recorded gold strikes in the region back in 1858. Stuart had since served as a local sheriff and carried a reputation for caution and organization, qualities that would matter a great deal in the weeks ahead. In the early spring of 1863 he assembled a party to prospect the Yellowstone and Bighorn watersheds, a venture he would later记录 in his own diary under the title "The Yellowstone Expedition of 1863," subsequently published by the Historical Society of Montana (Stuart 149). The National Park Service, drawing on the same events from the perspective of the Bighorn country the party eventually reached, has referred to the same venture as the Bighorn Expedition of 1863 ("The Bighorn Expedition of 1863").

Departure and an Unplanned Separation

The party that left Bannack numbered fifteen men, a deliberately substantial group meant to guard against the dangers of traveling through contested hunting grounds shared by the Crow, Sioux, and other Plains peoples ("The Bighorn Expedition of 1863"). It included men whose later careers would diverge dramatically. Samuel T. Hauser, one of the expedition's organizers, would go on to serve as territorial governor of Montana in the 1880s and would later help organize the celebrated 1870 Washburn party that explored the region that became Yellowstone National Park ("Men of the Bighorn Expedition 1863"). George Ives, another member, would within two years become a notorious road agent, one of the men whose robberies helped ignite Montana's vigilante movement before he was hanged at Nevada City in December 1863 ("Men of the Bighorn Expedition 1863").

Before the main body had gone far, a smaller company attempting to join Stuart's expedition became separated from it. This group, which included William Fairweather, Henry Edgar, Thomas Cover, and several companions, was turned back by a band of Crow near present-day Livingston and found itself retracing its route toward Bannack, its members convinced the trip had been a failure. It was on this discouraged return journey, on May 26, 1863, that Fairweather and Edgar discovered gold along the banks of a stream lined with alder trees. The site, soon known as Alder Gulch, would prove to be one of the richest placer deposits ever found in North America, yielding an estimated ten million dollars in gold within its first year and roughly thirty million dollars over three years. The strike emptied Bannack almost overnight and gave rise to Virginia City and Nevada City, with Virginia City soon replacing Bannack as Montana's territorial capital. As one early Montana memoirist later observed, the very day the Fairweather men stumbled onto their fortune was the same day the main Stuart party, still pushing east, was fleeing for its life from an Indian attack—a coincidence of timing that has struck later historians as almost too neat to be believed, though the documentary record supports it (Vaughn).

Down the Yellowstone to the Bighorn

While the Fairweather men turned back, Stuart's main party pressed on toward the Bighorn River, following in part a route earlier scouted by the 1860 Raynolds Expedition ("The Bighorn Expedition of 1863"). By May 5 they had reached the mouth of the Bighorn, where several men tested sandbars for gold with modest, inconclusive results. One member, Henry Geery, very nearly drowned after being swept into a whirlpool at the confluence of the Bighorn and Yellowstone rivers ("Timeline: The Bighorn Expedition of 1863"). The following day, five men crossed the river to survey a prospective townsite, which they named Big Horn City, laying out roughly six hundred forty acres for the town and thirteen surrounding ranch claims of one hundred sixty acres apiece—an ambitious plan for a settlement that would never materialize ("Timeline: The Bighorn Expedition of 1863"). By May 8 the party was working its way up the west side of the Bighorn, with two men detached to prospect the Little Bighorn River. They found only scattered traces of gold, not enough to justify further effort, but they noted, with evident unease, numerous signs that Indians were active throughout the area ("The Bighorn Expedition of 1863").

That unease proved warranted. On May 11 the party spotted three riders on horseback across the river, too distant to identify with certainty ("The Bighorn Expedition of 1863"). The following night, the camp came under direct attack.

The Attack

Just after eleven at night, gunfire erupted from the darkness. The first shots, fired from double-barreled shotguns, killed six of the party's horses outright and wounded five more before the attackers switched to arrows ("Bighorn Expedition of 1863, Part Two"). The fifteen men held their position through the night. When dawn broke, they took stock of the damage: seven men had been wounded, six by gunfire and one by an arrow. Ephraim Bostwick had been shot five times, and Cyprus D. Watkins had taken a wound to the left cheek; Hauser himself was struck in the left breast ("Bighorn Expedition of 1863, Part Two"; "Men of the Bighorn Expedition 1863"). Stuart believed the attackers were Crow, but later assessments, including the National Park Service's own account of the episode, judge it more likely that the raiders were Sioux, operating in territory the Crow themselves also contested ("Bighorn Expedition of 1863, Part Two").

Facing a badly weakened party and an uncertain number of hostile riders in the vicinity, Stuart and his men made a hard decision. Rather than retreat along the route they had come by, which would have taken them back through open country where they had already been spotted, they abandoned most of their supplies, kept only five or six days of rations, and struck out south through unfamiliar terrain. Their route took them through what is believed to have been the first passage by white men through Garvin Basin, up and over Devil Canyon, and around Medicine Mountain through deep, late-season snow ("Bighorn Expedition of 1863, Part Two"). For ten days they pushed south under harsh conditions before finally reaching Pacific City, a waypoint on the Oregon Trail near South Pass, on May 28 ("Timeline: The Bighorn Expedition of 1863"). It would be nearly another month before the exhausted party finally reached Bannack again, arriving June 22, 1863. Stuart himself wrote that the men were "so dilapidated generally, that scarcely anyone knew us at first," a line that captures the physical toll of the six-week ordeal better than any secondhand description could (qtd. in "Timeline: The Bighorn Expedition of 1863").

Aftermath and Divergent Legacies

The 1863 Yellowstone Expedition produced no gold strike of its own. The traces found along the Bighorn's sandbars were promising enough to draw later prospectors back to the region over the following three decades, but none of those efforts matched the scale of what the separated Fairweather party had stumbled onto at Alder Gulch ("Bighorn Expedition of 1863, Part Two"). In that sense, the expedition's most consequential outcome was one it did not directly produce: the discovery that reshaped Montana's mining economy and political geography happened only because a portion of Stuart's intended company had been turned away from joining him.

The expedition's human toll and its aftermath tell a broader story about the era. Three of the fifteen men eventually died of wounds connected to the trip, according to National Park Service accounts of the venture, while others faded into obscurity or met modest success in later years ("Men of the Bighorn Expedition 1863"). Stuart himself continued to be a prominent figure in Montana's territorial life, later serving as physician at the Fort Peck Agency before dying of cancer in 1873 ("Men of the Bighorn Expedition 1863"). Hauser's path led to the governor's office and, seven years later, to a leading role in organizing the 1870 Washburn party's exploration of the Yellowstone region—an expedition Hauser and others insisted on approaching only with a party large enough to mount a proper nightly guard, a precaution drawn explicitly from the lesson of 1863. Stuart himself declined to join that later expedition unless enough men could be found, recalling that his 1863 party had faced "a most desperate fight with a band of Indians...which outnumbered them five to one" (qtd. in "The Washburn Party (1870)"). Ives, for his part, took a darker path, turning to robbery along the Bannack-Virginia City road before his execution by vigilantes in December 1863, an event tied to the broader unrest that gripped Montana's mining camps in the aftermath of the Alder Gulch rush.

Taken together, the events of spring 1863 illustrate how thin the line could be between failure and fortune on Montana's mining frontier. A well-organized, well-armed expedition into contested territory returned battered and empty-handed, while a smaller, discouraged group turned back by the same danger walked, almost by accident, into one of the richest gold strikes in American history. The Yellowstone Expedition of 1863 is, in the end, less a story of discovery than one of risk, endurance, and the unpredictable arithmetic of who finds what, and where, in unmapped country.

Works Cited

"Bighorn Expedition of 1863, Part Two." Bighorn Canyon National Recreation Area, National Park Service, www.nps.gov/bica/learn/historyculture/bighorn-expedition-of-1863-part-two.htm. Accessed 24 July 2026.

Haines, Aubrey L. "The Prospecting Era, 1863–71." Yellowstone National Park: Its Exploration and Establishment, National Park Service, 1974. Yellowstone.net, yellowstone.net/history/the-prospecting-era-1863-71. Accessed 24 July 2026.

"Men of the Bighorn Expedition 1863." Bighorn Canyon National Recreation Area, National Park Service, www.nps.gov/bica/learn/historyculture/men-of-the-bighorn-expedition-1863.htm. Accessed 24 July 2026.

Stuart, James. "The Yellowstone Expedition of 1863." Contributions to the Historical Society of Montana, vol. 1, Rocky Mountain Publishing Company, 1876, pp. 149–233.

"The Bighorn Expedition of 1863." Bighorn Canyon National Recreation Area, National Park Service, www.nps.gov/bica/learn/historyculture/the-bighorn-expedition-of-1863.htm. Accessed 24 July 2026.

"The Washburn Party (1870)." Yellowstone.net, yellowstone.net/history/the-washburn-party-1870/. Accessed 24 July 2026.

"Timeline: The Bighorn Expedition of 1863." Bighorn Canyon National Recreation Area, National Park Service, www.nps.gov/bica/learn/historyculture/timeline-the-bighorn-expedition-of-1863.htm. Accessed 24 July 2026.

Vaughn, Robert. Then and Now; or, Thirty-Six Years in the Rockies. Tribune Printing, 1900. Project Gutenberg, www.gutenberg.org/files/47334/47334-h/47334-h.htm. Accessed 24 July 2026.