The Rocky Mountain Lacrosse League (RMLL) is a box lacrosse league based in Alberta with three teams in Saskatchewan and, as of 2018, one in Manitoba. It is sanctioned by the Alberta Lacrosse Association. RMLL organizes all senior and junior play in the province. The league is broken into several divisions: Senior B, Senior C, Junior A, Junior B, Tier II and Tier III. Junior Ladies and Senior Ladies divisions were added in 2004 and 2011, respectively.