When did recreational marijuana become legalized in Oregon?

Recreational marijuana was legalized in Oregon following the passage of Measure 91, which was approved by voters in November 2014. This measure allowed adults aged 21 and over to possess and use recreational marijuana as well as to cultivate a limited number of plants for personal use. Although the actual sale of recreational marijuana did not commence until later, specifically on October 1, 2015, the legalization itself occurred with the voters' approval in November 2014. Therefore, this date is significant as it marks the transition towards legal recreational use within the state, framing the context for subsequent regulations and the establishment of the recreational market.