1.Worldmarathonchallenge.com
The World Marathon Challenge is an amazing logistical and physical challenge to run 7 marathons on 7 continents in 7 days, or 168 hours. In January / February 2023, the first marathon is scheduled to begin at Novo (Antarctica) and is followed by marathons in Cape Town (Africa), Perth (Australia), Dubai (Asia), Madrid (Europe), Fortaleza (South America) and Miami (North America).