Puerto Rico East Coast (Puerto Rico)
Puerto Rico east coast run from the south (Arroyo) to the north (Las Croabas). A combination of mountain roads and coastal with views of the ocean. The route is part of a bike event which goes around the island in 3 days 375 miles considered the one of best by Bicycling Magazine.
Admin note: To run the entire east coast, it seems like one should include Faro de las Cabezas de San Juan in the north.