Understanding movement ecology and behavior of lake charr Salvelinus namaycush is important for successful conservation and management of populations. The lake charr is a cold-water species that evolved in meltwaters along the margins of retreating glaciers. Lake charr exhibit diverse life history, physiology, and behavior that allowed them to adapt to a variety of ecosystems across their native range, and to quickly colonize new lakes, as has occurred recently in the western United States. Movement and behavior of lake charr are motivated by four primary drivers: (1) access to cool, well-oxygenated water, (2) foraging opportunities, (3) predator avoidance, and (4) reproduction. Much has been learned about lake charr movement and behavior over the last several decades since the last major review of lake charr movement ecology and behavior. Increasingly detailed observations of novel behavior, made possible largely through use of advanced technologies that allow repeated observations of individuals over large spatial or temporal scales, suggest that lake charr behavior is more complex than has been previously described. We have incorporated these new observations into revised conceptual models. Our intent is that these revised models be viewed as testable hypotheses that serve as a theoretical framework on which to base future research.