1977-Aug. 1979: Gaithersburg, Md. : Equine Health Publications Co.
Sept. 1979-July 1998: Gaithersburg, Md. : Fleet Street Publishing Corp.
Aug. 1998-June 1999: [Gaithersburg, Md.] : Cowles Enthusiast Media
July 1999-Nov. 2007: New York : Primedia Enthusiast Publications, Inc.
Dec. 2007-June 2010: New York : Source Interlink Media, Inc.
July 2010- : Boulder, CO : Cruz Bay Publishing, Inc.