This chapter introduces the method of cross-contextual temporal analysis, a way of analyzing vast longitudinal data sets by paying attention simultaneously to the synchronic scope of the material and to the longitudinal changes and continuities. The method is particularly suited for carrying cross-national comparative analyses with qualitative data. It further enhances the methodology of case-analysis, which has become a popular method of organizing and analyzing qualitative longitudinal data over the last two decades. The chapter critically reflects on the tendency of qualitative longitudinal research to favor individual case histories over synchronic, contextual, and cross-sectional analysis. The methodology is presented in detail by using as an example of the project The Future of Nordic Youth in Rural Regions: A Cross-national Qualitative Longitudinal Study in Four Nordic Countries (Funore), which has involved qualitative longitudinal data from 196 young people, living in nine different geographical locations in four Nordic countries, collected over a time span of ten years. The methodology is based on the principles of first mapping and compressing, and then unpacking and elaborating: first reducing and structuring the qualitative data so that we could compare the key themes, and then elaborating on what we found meaningful, while simultaneously privileging both individual and community narratives. The chapter concludes with discussing different possibilities of using the method and the consequences of those choices.