The Mountain Pacific Curling Association (MoPac) is a regional association of the United States Curling Association encompassing the states of Arizona, California, Idaho, Oregon, Montana, Nevada, and Utah.
MoPac sends regional representatives to a number of national competitions, hosting playdowns to determine the representative if there are multiple teams interested. In addition, MoPac has held a 5 & Under Bonspiel annually since 2012 for any curlers of member clubs that have been curling for 5 years or less.