Marijuana is illegal according to federal law. This means the Drug Enforcement Agency (DEA), Federal Bureau of Investigation (FBI), National Park Service, the U.S. Immigration and Customs Enforcement (ICE) agency and others can confiscate people’s marijuana and/ or cite people for marijuana cultivation, distribution, possession, and use.
Federal land is under federal law. Marijuana is legal according to California state law, but not federal law. If you’re on federal land, such as a national park or a national forest, you cannot have it in your possession.
Tribal land is sovereign; however, under U.S. law, Congress has the authority to legislate on tribal issues. According to a 2014 Obama Administration memo, effective federal law enforcement in Indian Country, including marijuana enforcement, requires consultation with tribal partners.
So, although marijuana is legal according to California state law, it is important to understand that federal and tribal laws can supercede state law.