| Marathon is a city on Boot Key, Key Vaca, Fat Deer Key, Long Point Key, Crawl Key and Grassy Key islands in the middle Florida Keys, in Monroe County.As of 2005, the population was 10,626. The city has a total area of 9.6 square miles of which 1 square mile is water. Marathon is a relatively new city, incorporated in 1999, even though it has been settled for some time. The name Marathon came about by railroad workers who were working day and night on the Florida East Coast Railroad. They complained that the project "is getting to be a real Marathon", and the name was later used to name the local station along the railroad. |