More than half of the fatal injuries on the railroads in the United States are sustained by trespassers. The paper provides a statistical analysis of the demographics of trespassers, the activities the trespassers were engaged in, and the causes of injury. It also analyzes trends over time and between different parts of the country. The paper finds that the risks of injury and death are particularly acute for males in their 20s and 30s. The total number of annual casualties has remained relatively stable in recent decades because growing affluence, which tends to reduce risk-taking behavior, has been balanced by increases in railroad activity and the size of the population.