The East Coast Greenway is a developing trail system, spanning nearly 3,000 miles as it winds its way between Canada and Key West, FL, linking all the major cities of the eastern seaboard.

Florida boasts the longest portion of Greenway with the most miles of completed trail. North to south, the Greenway enters the state at Fernandina Beach then continues 584 miles to Key West, the United States' southernmost mainland point. The Greenway travels largely along the coast, through seaside villages, America's earliest historic sites, through vast nature preserves, and major cities that include Jacksonville and Miami. The route includes 198 miles of completed traffic-free paths and the most bridges of any ECG state.

Much of the Greenway through Florida is on wide sidepath that runs along Highway A1A. It concludes with the Florida Keys Overseas Heritage Trail, which hops from island to island for 106 miles.  More about the Florida East Coast Greenway.