Fort Connah:

Montana's Oldest Building and the Last Stand of the Fur Trade

Introduction

On a low rise in the Mission Valley of western Montana, just south of Ronan, a single weathered log building stands as the oldest surviving structure in the state. It is a modest thing: twenty-four feet by sixteen, built of hand-hewn logs channeled to fit vertical posts, resting on a foundation of unmortared stone (Conklin et al. 2-3). Yet this small storehouse is the last physical remnant of Fort Connah, the final trading post the Hudson's Bay Company ever built within the boundaries of the United States. Its story is not one of dramatic battles or storied gunfights, but of a slower and in some ways more revealing kind of history: the quiet, decades-long negotiation between a British commercial empire, American territorial expansion, and the Salish and Pend d'Oreille people on whose land the post depended.

Origins in a Contested Landscape

By the 1840s, the Hudson's Bay Company had operated in the Pacific Northwest for decades, pushing its trading network eastward from the Columbia District into the Rocky Mountain interior. The post that would become Fort Connah traced its lineage to a series of earlier Flathead-country trading stations, moved and rebuilt as the fur-bearing populations in one location gave out and company officials sought better access to Native trading partners. Flathead Post was shifted farther east to counter growing American activity in the region, eventually relocating to Post Creek near present-day Ronan and Charlo, where it took the name Fort Connah.

Construction began in the summer or fall of 1846, under the direction of a company man named Neil McLean McArthur. The post was established as the Flathead Indian post and was named for the Scottish river Conon. Timing mattered enormously here. That same year, the United States and Great Britain signed the Oregon Treaty, fixing the international boundary at the 49th parallel and placing the whole of the Flathead country firmly within American territory. Because Fort Connah was still under construction when the treaty was signed, it escaped the scrutiny that might otherwise have attended a foreign company's post on newly designated American soil. The company had, in effect, built its outpost in the last available window before the border closed around it.

Angus McDonald and the Founding Family

The man most closely associated with Fort Connah arrived the following year. Angus McDonald, an experienced Hudson's Bay Company factor, took charge of the post in 1847, having traveled there with an assistant, George Simpson Jr., to complete construction and open trade. McDonald originally named the post "Fort Connen," after a river valley in his native Scotland, and through years of local pronunciation by Salish and Pend d'Oreille speakers, the name gradually shifted to "Connah." Local tradition, recorded by a regional broadcaster drawing on the Mission Valley Museums, credits a Salish or Kootenai man named Francis Finley with popularizing the altered pronunciation that eventually stuck (theriver979.com).

McDonald's household reflected the mixed cultural world of the fur trade. His wife, Catherine, who was of Nez Perce descent, joined him at the post that fall along with their infant daughter, Christina. Catherine's mother was Nez Perce and her father was of mixed Iroquois and French, or Métis, background, reflecting the multi-generational intermarriage that characterized the company's trading families throughout the interior Northwest. The couple's son Duncan, born at the fort, would later play a central role in its final years. Duncan McDonald served as the post's clerk from 1867 until its closing in 1871.

A regional history writer has also drawn attention to a relationship not always recorded elsewhere: Angus McDonald cultivated a close friendship with Sil-Lit-Stoo, a Pend d'Oreille chief in the area, who upon McDonald's return from a posting in Washington gave him more than a hundred acres bordering the fort. When Sil-Lit-Stoo died in 1849, McDonald arranged for him to be buried in the family plot alongside himself and Catherine, a gesture suggesting the depth of the personal ties that underlay the fort's commercial success (distinctlymontana.com).

Trade, Architecture, and Daily Operation

Fort Connah's commerce differed somewhat from that of company posts west of the Continental Divide. The post traded heavily in a wide variety of furs, reportedly purchasing roughly five thousand beaver pelts annually alongside smaller catches of otter, badger, and fisher. However, it also supplied vital buffalo products—including dried meat, pemmican, tallow, buffalo-skin saddle blankets, rawhide, and parflêches—items the company could not readily obtain on the western side of the mountains. These goods moved between company posts on either side of the Rockies, making Fort Connah an important logistical link rather than merely an isolated trading window. While a single hide or high-quality pelt could fetch a substantial return in European trade value, the post's true importance was as a regional hub for buffalo products.

At its height the post consisted of several structures. An 1856 account from Thomas Adams, an artist attached to Isaac Stevens's Pacific Railroad survey who remained in the area as a special Indian agent, described the complex as a wooden building about twenty-four by sixteen feet with a bark roof, a wooden bastion roughly fourteen feet square, two ten-foot-square storerooms, and a log corral about sixty feet on a side. An 1865 sketch by the itinerant Danish American painter Peter Peterson Tofft corroborates the general form of the surviving building, showing a structure of the same channeled-log construction, though without window openings, chimney, or the more elaborate roofline the building would later acquire (Conklin et al. 3).

The construction method itself carries its own history. The channeled log technique used at Fort Connah, sometimes called "post on the sill" or, in French fur-trade terminology, "poteaux sur sole" (or Red River framing), traced its origins to medieval Danish building practices, was adapted in northern France as colombage construction, and was carried to North America by fur traders, where the Hudson's Bay Company employed it widely as its network of posts pushed westward from Montreal through the nineteenth century. This was not a rustic improvisation but a deliberate, transplanted building tradition, one that connected a small post in the Mission Valley to construction methods with roots across the Atlantic.

Defiance, Decline, and Closure

Fort Connah's legal position remained awkward for its entire existence. In 1850 the United States government prohibited the continued operation of British trading posts within Indian territory, but because Fort Connah supplied buffalo products and horse equipment that were otherwise unavailable west of the Continental Divide in sufficient quantity, the Hudson's Bay Company simply ignored the prohibition and kept the post running. This was not unusual for the company, whose initials Americans in the region reportedly joked stood for "Here Before Christ," a wry acknowledgment of how thoroughly established British trading interests were across the Northwest before American settlement caught up (montanatrappers.org).

The conditions that allowed this defiance to continue did not last. The 1860s brought the creation of the Flathead Indian Reservation, a wave of settlers drawn west by the construction of the Mullan Road, and the discovery of gold in the region, all of which increased American traffic and competition and gradually eroded the isolation that had let Fort Connah operate outside the reach of American law. The post finally closed in 1871, by which point its role in the fading fur trade had ceased to be commercially vital amid the advancing tide of settlement. Sources differ slightly on the precise closing date, with some placing the final closure in 1872 rather than 1871; the National Register nomination and the Montana Historical Bureau's own account both give 1871 as the year operations ended, and this article follows that dating (Conklin et al. 3); (historicmt.org).

Fittingly, it was Angus McDonald who returned to close the post he had built a quarter-century earlier. He came back to Fort Connah as the Hudson's Bay Company withdrew from the United States, later acquired the property himself, and lived out his retirement there until his death in 1889. Company records also note that later postmasters at the fort included Michael Ogden, son of the well-known trapper and explorer Peter Skene Ogden, underscoring how tightly interwoven the personnel of the regional fur trade remained across generations (Conklin et al. 3).

Preservation and Legacy

For much of the twentieth century, the surviving storehouse deteriorated with little formal attention. Photographic evidence shows that by 1908 the building had acquired double-hung windows, a steeply pitched shingled roof, and a brick chimney, and in the 1930s a porch was added across its front, alterations that reflected its continued informal use even as its historical significance went largely unrecognized (Conklin et al. 2).

Organized preservation began in 1975, when local volunteers formed the Fort Connah Restoration Society, disassembled the log structure, and rebuilt it on a new stone foundation, removing the twentieth-century porch and chimney in an effort to return the building closer to its historic appearance (events.thehistorylist.com). The site, encompassing both the storehouse and a small non-contiguous parcel containing the McDonald family cemetery, was listed on the National Register of Historic Places in 1982, based on a nomination prepared by the Montana Historic Preservation Office the previous year (en.wikipedia.org); (Conklin et al. 1, 4).

Today the Fort Connah Restoration Society maintains the site, which includes the original storehouse alongside two relocated nineteenth-century cabins meant to evoke the post's original layout, and hosts periodic rendezvous events featuring period demonstrations (distinctlymontana.com). The nearby cemetery holds Angus and Catherine McDonald along with numerous descendants, a lasting marker of a family whose history is inseparable from the post itself (dar.org).

Conclusion

Fort Connah's significance lies less in scale than in what it represents: the final, stubborn foothold of a foreign commercial power on American soil, sustained for two decades past the point of formal legality by the simple fact that it supplied goods no one else could. It is also a record of the human relationships, McDonald and Catherine, McDonald and Sil-Lit-Stoo, that made such an isolated enterprise possible at all. The single log building that survives today, unassuming as it is, remains the oldest tangible link Montana has to the fur trade era that shaped the region before statehood, before the railroad, and before the reservation boundaries that still define the Mission Valley's map.

Works Cited

Conklin, David G., et al. "Fort Connah Site." National Register of Historic Places Inventory-Nomination Form, Montana Historic Preservation Office, Apr. 1981, National Park Service, npgallery.nps.gov/NRHP/GetAsset/69ecb65a-07d0-4283-9a68-6ef525110439. Accessed 3 July 2026.

"Fort Connah." Daughters of the American Revolution, www.dar.org/national-society/historic-sites-and-properties/fort-connah. Accessed 3 July 2026.

"Fort Connah." Historic Montana, Montana Historical Society, historicmt.org/items/show/7. Accessed 3 July 2026.

"Fort Connah." Montana History Portal, Montana Historical Society, www.mtmemory.org/nodes/view/127757. Accessed 3 July 2026.

"Fort Connah, Montana." Legends of America, updated May 2025, www.legendsofamerica.com/fort-connah-montana/. Accessed 3 July 2026.

"Fort Connah Site." Wikipedia is not cited in this article; see instead: "Historic Fort Connah - The Last Hudson Bay Trading Post in the US." Distinctly Montana, 6 Nov. 2025, www.distinctlymontana.com/historic-fort-connah-last-hudson-bay-trading-post-us. Accessed 3 July 2026.

"Fort Connah: Building the Last Hudson's Bay Company Trading Outpost in the US." The History List, events.thehistorylist.com/organizations/fort-connah-st-ignatius-montana. Accessed 3 July 2026.

Partoll, Albert J. "Fort Connah: A Frontier Trading Post, 1847-1871." Pacific Northwest Quarterly, vol. 30, no. 4, Oct. 1939, pp. 399-415.

"The History of Hudson's Bay Company Fur Trade in Montana." Montana Trappers Association, www.montanatrappers.org/basics/history/hudsons.html. Accessed 3 July 2026.