Montana Tribal Gaming Explained: Compacts, Machine Caps and 400 Horses

Montana is one of the quieter tribal gaming markets in the United States, and its structure is easy to misread. Unlike California or Oklahoma, where large Class III resorts dominate, Montana’s tribal gaming consists mostly of mid-sized and small casinos operating under compacts that cap machine counts and set wager and payout limits. This explainer describes how Montana’s tribal gaming market is organized: which reservations have Class III compacts, what those compacts permit, and where a new development such as the Confederated Salish and Kootenai Tribes’ 400 Horses Casino fits.

Seven reservations, a patchwork of authority

Montana has seven reservations, and they do not share a single gaming regime. According to the Montana Department of Justice, the state has Class III compacts with five of them: Fort Peck, Rocky Boy’s (Chippewa Cree), Crow, Fort Belknap and Northern Cheyenne. The Blackfeet Tribe does not have a Class III compact, and its Glacier Peaks Casino offers Class II gaming only. The Confederated Salish and Kootenai Tribes (CSKT) of the Flathead Reservation have a more recent compact, approved in January 2026 according to the state’s description of the agreement, which also allows sports wagering under shared state-tribal jurisdiction. The differences between Class II and Class III matter here, and readers who need a refresher can consult our Class II versus Class III explainer.

The reason for the patchwork is the structure of the Indian Gaming Regulatory Act. Class II games, essentially bingo and similar games, are regulated by tribes and the National Indian Gaming Commission, while Class III games, which include slot machines and house-banked table games, require a tribal-state compact. Each Montana compact was negotiated separately, at different times, so terms differ. The Legal Guide provides the broader legal framework.

What the compacts permit

Montana’s compacts are notable for their specificity about machines and wagers. Based on the state’s published summaries, the Fort Peck compact (2023) authorizes up to 925 Class III machines, with regular machines limited to a $10 wager and a $3,000 payout and up to one-third designated as high-stakes machines allowing a $50 wager and a $5,000 payout. The Chippewa Cree compact (2012) allows up to 750 machines with wagers up to $10, and payouts of up to $3,000 on as many as 500 machines and up to $5,000 on as many as 250 machines. The Crow compact, as amended, allows up to 925 video machines with a similar high-stakes split. The Fort Belknap compact (2007) is the most restrictive of the group, with up to 400 video machines, a $5 wager and a $2,000 payout. Northern Cheyenne’s 2013 compact allows up to 750 machines at tribal casinos on the reservation and on trust land at Tongue River Reservoir, with a $3,000 maximum payout.

These caps are a form of what our device caps explainer describes: limits on the number of gaming devices that effectively set the ceiling for a tribe’s Class III revenue. Because Montana’s caps are lower than those in large-market states, the state’s casinos rely on local and regional customers and on convenience rather than destination appeal. For a sense of how that compares with other mid-sized markets, see our Wyoming market deep dive, and for a contrasting high-volume market see the California state hub.

400 Horses Casino: a new entrant

The most recent development in Montana is the opening of 400 Horses Casino in Polson, on Flathead Lake, which CSKT leaders celebrated in early May 2026. Reporting describes more than 300 slot machines, a bar and restaurant overlooking the lake, and more than 70 jobs. The casino is a new S&K Gaming venture. Some machines were moved from the neighboring Kwataqnuk Resort, which is being renovated, and tribal leaders said more than $1 million would flow back to tribal members, with additional donations to reservation organizations such as fire departments and local charities. Our report on the opening has further detail.

The project illustrates a common pattern in smaller tribal markets: a casino functions as both an enterprise and a community institution, with revenue directed toward member services and local giving. Our analysis of how tribal gaming revenue funds government services shows how widespread that model is.

Regulation and oversight

Day-to-day regulation of Montana tribal casinos is shared among tribal gaming commissions, the National Indian Gaming Commission and, to the extent the compacts provide, the state. Federal law takes precedence over state law on reservations, and Interior must approve compacts before they take effect. Where sports wagering is included, as in the CSKT compact, state and tribal jurisdiction overlap on the reservation. For an overview of the roles of each layer, see our explainer on who regulates tribal casinos.

What to watch in Montana

Three questions will shape the market. First, whether the Blackfeet Tribe pursues a Class III compact, which would change its Glacier Peaks Casino’s competitive position. Second, how the CSKT’s sports wagering authority is implemented alongside the state’s own regime. Third, whether any of the older compacts are amended to raise machine caps or wager limits, as has occurred in other states. None of these developments has been announced, and we flag them only as the structural issues a reader should track. Montana’s tribal market may be small, but it offers a clear example of how compact terms, rather than market size alone, define what a tribal casino can offer.