Stand age structures of Eastern White Pine (Pious strobus L.) were analysed on three sites with different fire histories (latest fire 1760, 1825 and 1941, respectively) in Québec to assess whether Eastern White Pine is regenerating or not at its northern limit. Previous paleo-botanical findings suggest that this species once extended ca 100 km further north than the present distribution limit in Québec. All three sites (dry habitats) represented vital populations where the individuals were established after the most recent fire. The results suggest that the relative lack of dry and/or disturbed sites in combination with a more severe fire regime that characterizes the northern lowlands may explain why white pine expansion is restricted northwards. ©The Ottawa Field-Naturalists' Club. Abstract reproduced by permission.