Miles High Comics owns and operates four retail comic book stores on the Front Range in Colorado. Its stores carry a large inventory of comics, books, supplies, posters, memorabilia, for characters, such as Batman, Spider-Man, the X-Men, Conan the Barbarian and Ghost Rider. The company has more than 5 million back issue comics in stock, with more than 100,000 separate issues listed. Mile High was established in 1969 and has retail stores in Thornton, Denver, Lakewood and Littleton, Colo.