 Competitors can enter any of the individual multiday races within the 4 Deserts Race Series, but if they wish to take part in The Last Desert (Antarctica) they must successfully finish at least two of the other races in the series.To date, more than sixty races have been staged with more than 10,000 individuals representing 100+ countries in the races.Many participants return to compete in additional events, and there is a growing list of members in the 4 Deserts Club and 4 Deserts Grand Slam Club.