OmniTRAX, Inc. is a transportation and transportation infrastructure holding company based in Denver, Colorado, in the United States. It primarily owns or operates railroads, with a network of 25 regional and shortline railroads in 12 U.S. states and three Canadian provinces. It is one of the largest privately owned railroad companies in the United States. The firm also invests in, develops, and operates ports, multimodal transportation terminals, and industrial parks.