Kelly and Patrick discuss one of the most important questions in the outdoor recreation research space: how many people are participating in an activity? The extra nerdy discussion revolves around different methods of measuring participation, as well as the strengths and limitations of each methodology. How can we preserve historic trends while using the most appropriate methodology? What does the future of participation research look like?Follow this link to access bicycling participation data from PeopleForBikes and this link for OIA’s participation data.