Pentrex Media Group, LLC, is an American producer and seller of railfan-related videos and DVDs, founded in 1984 and currently based in Pasadena, California. The company discontinued the sale of VHS video tapes on July 31, 2009. In 2007, the Midwest Book Review's "Wisconsin Bookwatch" recommended Pentrex as "the premier producer of railroading documentaries showcasing and highlight the trains and rail systems, the routes and histories, their engines, equipment, bridges, and more".