This presentation will provide an overview of several models and modeling systems developed by authors over the past 10 years for simulating certain aspects of crown fire behavior. Based on a wealth of high-quality fire behavior data collected over some three decades of experimental burning principally in Canada, the authors have developed and tested several empirical and semi-physically-based models aimed at predicting the onset of crowning, the type of crown fire (i.e., passive or active) and the associated rate of spread.