The Club is unique, reserved for athletes who have run a marathon within the Antarctic Circle on the Antarctica continent, as well as on the other six continents. See The 7 Marathons Club Rules & Definitions. Membership is not conditional on paying a membership fee and it is the definitive and official list of people who have completed marathons on all 7 continents.

The Antarctic Ice Marathon and the Antarctica Intercontinental Marathon (part of the World Marathon Challenge) are the only two official marathon events within the Antarctic Circle on mainland Antarctica. The Ice Marathon is also the southernmost marathon on earth. Both races are full member of the Association of International Marathons and Distance Races (AIMS) and recognized by Guinness World Records and the Book of Alternative Records for record setting purposes.

New members of the Club will receive a 7 Marathon sClub medal OR an Intercontinental Marathon Club medal for completing 7 marathons on 7 continents within 7 days at the World Marathon Challenge. The Marathon Grand Slam Club members will also receive a 7 Continents Marathon Club medal.