Marathon is a city in the middle of the Florida Keys, in Monroe County, Florida, United States. As of the 2020 census, the city had a population of 9,689, up from 8,297 in 2010.
Marathon, Florida
A trailer park under construction in Marathon, 1973
Faro Blanco Lighthouse
The Florida Keys are a coral cay archipelago off the southern coast of Florida, forming the southernmost part of the continental United States. They begin at the southeastern coast of the Florida peninsula, about 15 miles (24 km) south of Miami and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry Tortugas. The islands lie along the Florida Straits, dividing the Atlantic Ocean to the east from the Gulf of Mexico to the northwest, and defining one edge of Florida Bay. The southern part of Key West is 93 miles (150 km) from Cuba. The Keys are located between about 24.3 and 25.5 degrees North latitude.
Coconut palms in Islamorada, Florida in the Florida Keys
The Keys were formed near the edge of the Florida Platform
Satellite image of the Florida Keys, December 2003
Lower Matecumbe Key to Key Largo, captured by the Sentinel-2 satellite