Thomas Cruse arrived in Montana in the early 1870s with a reputation for bad luck. He had grubstaked his way across the West without finding anything worth keeping, and by the time he reached the mountains northwest of Helena he was, by most accounts, running low on both money and patience. In the summer of 1876, working a drainage called Ottawa Gulch in the Flint Creek foothills of Lewis and Clark County, he found a gold vein in the rock face and traced it to a lode he named the Drumlummon Mine, after the parish in County Roscommon where he had been born. The name was a piece of sentiment from a man who had traveled a long way from home, and it turned out to be the most consequential thing he had ever done.

The Drumlummon Mine became one of the great gold producers of the nineteenth-century West. Cruse worked it himself for several years, extracting ore by hand and shipping it to Helena for processing, accumulating a fortune that he had not expected and did not quite know what to do with. In 1882, he sold the mine to a British syndicate, the Montana Company, for a price variously reported as between one and two million dollars, a sum that made him one of the wealthiest men in Montana Territory. He used the money to build a mansion in Helena, to endow a Catholic cathedral, and to live out his days as a gentleman, which was not the life he had been born to but which he managed creditably.

The British investors who bought the Drumlummon were serious operators. They brought in machinery, expanded the underground workings, and built the infrastructure required to process ore at scale. The town of Marysville, which had grown up around the mine, grew with the operation. It took its name not from the mine but from Mary Ralston, recognized as the first pioneer woman to settle in the area, a small acknowledgment of the domestic life that was always present alongside the industrial one in these camps. By the late 1880s, Marysville had a population approaching three thousand people and the amenities to match: twenty-seven saloons, seven hotels, three newspapers, a bank, churches, a school serving more than two hundred and fifty children, and two separate railroad lines connecting the town to Helena.

The Drumlummon Mine yielded nearly sixteen million dollars in gold over its working life. The broader Marysville Mining District, which included the Bald Butte and Belmont mines and a dozen smaller operations in the surrounding gulches, produced more than thirty million dollars in total by the early twentieth century. The district was, for a period in the 1880s and 1890s, reported to be the richest gold mining area in the world, a claim that was probably promotional but not entirely without basis.

Thomas Cruse, the man who started it all, did not stay to watch the decline. He had sold the Drumlummon in 1882 and moved to Helena, where he built a mansion on the hill above the city and became one of the most prominent citizens of the territory and then the state. He donated the land and a substantial portion of the construction cost for the Cathedral of Saint Helena, which was built in the Gothic style and remains one of the most striking buildings in Montana. He served in the territorial legislature and was appointed to the first state senate when Montana achieved statehood in 1889. He died in 1914, having lived long enough to see the town he had founded decline from its peak, though he was insulated from the consequences of that decline by the fortune he had made from it.

The silver panic of 1893 hit the silver operations west of Marysville hard, emptying camps and sending their populations down the road to wherever the next opportunity might be. The Drumlummon itself was a gold mine and was less directly affected, but the broader economic disruption of the 1890s, combined with the gradual exhaustion of the richest ore bodies, began the long decline. The mine continued intermittent production under various owners into the 1920s, but the population that had built the town had largely dispersed by the early years of the new century. By the time the last major operations shut down, Marysville was a place of empty buildings and a handful of people who had chosen to stay.

What Remains Today

Marysville is what Montanans sometimes call a partial ghost town, a place that has been largely abandoned but not entirely. As of the 2020 census, about eighty people live there, a small permanent community that maintains a connection to the place and its history. The Marysville Pioneers group operates a museum in the former high school and hosts an annual summer festival.

The physical record of the boom years is substantial. The Marysville Methodist Church, built in the 1880s, still stands, as do a number of miners' cabins and commercial buildings from the same era. The original street grid is intact. Several buildings are listed on the National Register of Historic Places. The overall character of the place is of a town that has been reduced to a fraction of its former size but has not been erased.

The Great Divide Ski Area, located nearby, has brought a modest seasonal economy to the area, and the mountain setting that once made the mines difficult to supply now draws recreationists in both winter and summer.

Visiting

Marysville is located approximately twenty miles northwest of Helena via a paved road that becomes gravel near the townsite. The drive takes about forty-five minutes from Helena. No formal visitor services exist at the townsite itself, but the general store has operated intermittently and the museum is open seasonally. The annual Marysville Days festival, held each summer, is the best time to visit if you want to encounter the community as a living thing rather than a relic.

The roads are generally passable for standard vehicles in summer. Winter access can be limited by snow.