This photo guide provides appraisals of fuels associated with endemic, epidemic and post-epidemic populations of bark beetles (Coleoptera: Curculionidae, Scolytinae) in Englemann spruce (Picea engelmannii Parry ex Engelm.), Douglas-fir (Pseudotsuga menziesii Mirb. Franco), and lodgepole pine (Pinus contorta Engelm.) forests located in the Intermountain region of the western United States. Specialists within fire and forest health communities may use this photo guide in conjunction with other information to help characterize bark beetle-induced changes in fuels complexes over time. This photo guide also provides custom fuel models that may be used for predicting fire hazard and potential fire behavior, and modeling fire behavior in bark beetle-affected landscapes.