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The tourism industry has long utilized statistical and time series analysis, as well as machine learning techniques to forecast leisure activity demand. However, there has been limited research and application of ensemble methods with respect to leisure demand prediction. The research presented in this paper appears to be the first to compare the predictive power of ensemble models developed from multiple linear regression (MLR), classification and regression trees (CART) and artificial neural networks (ANN), utilizing local, regional, and national data to model skier days. This research also concentrates on skier days prediction at a micro as opposed to a macro level where most of the tourism applications of machine learning techniques have occurred. While the ANN model accuracy improvements over the MLR and CART models were expected, the significant accuracy improvements attained by the ensemble …