
Mexican poly-drug smuggling organizations control the distribution of the majority of the methamphetamine, marijuana, cocaine and heroin in the state of Montana. These organizations have supply sources in Colorado, the southwest border, the Pacific Northwest, and Mexico. Further, marijuana is trafficked into Montana across the Canadian border by smaller smuggling organizations. Meth production and use continues to be the main drug problem facing law enforcement.
Cocaine is accessible in the bigger communities of Montana, but it is not widely accessible throughout Montana. Billings, Great Falls and the Blackfeet Indian Reservation are the main areas for cocaine use. Supply sources are generally situated in Washington, California, Colorado, and the Southwest. Crack smuggling in the state of Montana is mainly restricted to the Billings region, where street gangs dominate the market. These gangs have supply sources in Chicago and California.
In Montana, heroin is not found often. Western Montana, mainly Missoula, has a higher accessibility of heroin because of its proximity to Washington State, which is traditionally a transshipment area for heroin in the Pacific Northwest.
Law enforcement personnel across Montana report meth as the most substantial drug problem in the state. Mexican smuggling organizations dominate most of meth distribution in Montana. Mexican meth is most accessible in western Montana, because of the physical closeness to established smuggling routes in the Pacific Northwest. Beyond organized meth smuggling, many small-scale local lab operators, producing moderate amounts of meth for personal use or local distribution, are an issue for law enforcement.
Club drugs, including MDMA, are not widely accessible throughout Montana but can be encountered in the bigger communities and on college campuses. Smugglers are generally white males, age 18 to 25, with supply sources in the Seattle, Washington region. Abuse of other club drugs, including LSD, GHB, and Ketamine seem to be restricted to college communities.

In Montana, marijuana is the most commonly abused drug. Most of the marijuana found in Montana come from Mexico and is trafficked into Montana by Mexican poly-drug smuggling organizations. Locally produced marijuana is mainly grown indoors, with grows typically comprising of fewer than 100 plants. Strong "BC Bud" or “Kind Bud” from the Pacific Northwest and western Canada is growing in popularity and accessibility. It is frequently trafficked straight into Montana across the Canadian border. Thereafter, it is frequently transshipped to other areas of America.
In Montana, OxyContin is the pharmaceutical drug of abuse. Amounts of OxyContin are being illicitly distributed in different regions of Montana. Dilaudid and other opiate pain relievers are also in demand on the illegal market.
Based on current investigations, the diversion of hydrocodone products, including Vicodin remains an issue in Montana. The main strategies of diversion include forged prescriptions and employee theft. OxyContin, benzodiazepines (e.g. Xanax and Valium) and Adderall were also cited as being among the most frequently abused and diverted pharmaceuticals in the state of Montana.