Triangulum was a convention held at the Marc Plaza Hotel in Milwaukee, WI on August 30-September 1, 1985 (opposite the LoneStarCon Nasfic. The GoHs were Harlan Ellison and David Gerrold. It was sponsored by Triangulum Incorporated.

Con reports:

This is a convention page. Please extend it by adding information about the convention, including dates, GoHs, convention chairman, location, sponsoring organization, external links to convention pages, awards given, the program, notable events, anecdotes, pictures, scans of publications, pictures of T-shirts, con reports, etc.