400 Horses Casino Opens in Polson as CSKT Bet on Montana Growth

The Confederated Salish and Kootenai Tribes have opened the 400 Horses Casino in Polson, Montana, adding a purpose-built gaming facility to one of the most scenic corners of Indian Country. The new Montana tribal casino, operated by the tribes' S&K Gaming LLC, held its grand opening on May 5 and has been drawing steady traffic since, with tribal leaders and Indian Gaming Association figures marking the launch as a milestone for the Flathead Reservation economy.

The 35,000-square-foot building at 100 Irvine Flats Road houses more than 300 gaming machines along with the 371 Bar and Grill — a name that nods to the deepest point of Flathead Lake, measured in feet. Tribal officials expect the project to support more than 75 jobs and to generate revenue for the tribes over an anticipated operating life of 30 to 50 years.

A name chosen by the community

The casino's name came out of a community suggestion process and honors Chief Alexander, a 19th-century leader. His name translated as “No Horses,” but by the time of his death in 1868 he was known to own a herd of roughly 400 — a turn of fortune the tribes chose to carry forward into a project built explicitly around long-term wealth-building. It is a small detail, but a telling one: the facility was named by the people it is meant to serve, not by a branding consultancy.

The food-and-beverage program carries the same local register. The 371 Bar and Grill takes its name from a number every Flathead Lake local recognizes — the lake's deepest measured point, in feet — and gives the facility a hospitality anchor aimed at residents and lake-country visitors alike rather than a pastiche of generic casino dining. Tribal leaders who spoke at the opening, alongside Indian Gaming Association representatives, framed the project consistently in those terms: jobs, stable revenue, and sovereignty exercised through enterprise, rather than spectacle.

The economics of a right-sized casino

At just over 300 machines, 400 Horses is not chasing destination-resort scale, and that is the point. Montana's tribal gaming market is shaped by the state's distinctive gaming laws and dispersed population, which reward facilities sized to local demand rather than speculative tourism. A 35,000-square-foot floor with food and beverage anchored to local identity is a familiar and durable formula across rural Indian Country — high-margin, low-leverage, and resilient through economic cycles.

That conservatism stands in contrast to the leverage-heavy expansion wave running through larger markets, where nine-figure hotel towers are the norm. As we examined in our analysis of the 2026 tribal construction boom, capital reinvestment across Indian Country is at record levels — but the projects that age best tend to be the ones matched to their markets. For CSKT, a facility with a projected 30-to-50-year service life is less a bet on tourism than a piece of long-horizon fiscal infrastructure.

Job creation is the nearer-term payoff. Seventy-five-plus positions is a meaningful number in Lake County, and tribal gaming wages circulate locally — a dynamic documented across the industry in the 2025 tribal gaming economic impact report, which found tribal operations supporting hundreds of thousands of jobs nationwide, a large share held by non-Native employees in surrounding communities.

Where 400 Horses fits in the broader map

Montana rarely makes national tribal gaming headlines, and that obscurity understates what is happening there. CSKT's S&K Gaming joins a cohort of tribal operators in smaller states quietly professionalizing — building new facilities, formalizing management, and treating gaming as one pillar of a diversified portfolio rather than the whole strategy. CSKT itself has long been among the most economically diversified tribal governments in the northern Rockies, with enterprise holdings extending well beyond gaming — which means 400 Horses enters a portfolio built to absorb a slow year rather than a budget that depends on never having one.

The groundbreaking-to-opening arc also says something about execution. S&K Gaming brought the project from ceremony to operating floor on a disciplined timeline and at a scale its market can support — no small feat in a construction environment where labor and materials costs have stretched far larger tribal projects. A facility sized to be paid for, staffed, and steadily profitable is the kind that actually reaches the far end of a 30-to-50-year service life — and reaches it still serving the community that named it.

For readers tracking facilities tribe by tribe, our tribal casino directory covers properties across the United States and Canada, including the new Polson location. The through-line from this opening is simple: in 2026, tribal gaming growth is not only the mega-resorts of California and Florida. It is also a 300-machine floor on Irvine Flats Road, named for a chief whose fortunes turned, built to last half a century. The industry's center of gravity will always sit with the billion-dollar resorts — but its foundation is made of buildings like this one, opened debt-conscious and community-named, in counties where 75 jobs change household arithmetic. By that measure, May 5 in Polson was one of the more important days of the tribal gaming year.