With the recent introduction of recreational marijuana retail stores throughout the United States and other jurisdictions, research is warranted on whether responsible sales practices are implemented. We assessed store practices/policies in the first two US states to legalize recreational marijuana, Colorado and Washington. We surveyed a random sample of store managers (25 per state) and observed store practices in the largest city in each state (22 in Denver; 24 in Seattle). We analyzed many practices/policies with a focus on underage access (