People who choose to run a marathon on all seven continents are generally considered to be a part of the 7 continents club. However, there is some dispute over what counts for each continent, with specific issue being taken due to races being run in "Antarctica" that actually take place on outlying islands of the continent and not within the continent itself. Due to the extreme weather conditions in Antarctica, not all races are completed as promised. A notable example is 2001, the Antarctica Marathon in Antarctica had to be held on a boat.