Douglas-fir have life history traits that greatly enhance resistance to injury from fire, thereby increasing post-fire survival rates. Tools for predicting the probability of tree mortality following fire are important components of both pre-fire planning and post-fire management. Hood and Bentz (2007) developed models for predicting the probability of Douglas-fir mortality and Douglas-fir bark beetle attack in the Northern Rocky Mountains based on fire injury and stand characteristics. This supplemental field guide to RMRS-GTR-199 provides reference photographs to help quantify injury level for use with the post-fire Douglas-fir mortality and bark beetle attack models. It also includes descriptions for measuring each characteristic in the field.