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.

A walking/running route originally created by Horsham Joggers in 1994 as a challenge event for its members. The route quickly reaches rural paths, encircling the town. Passing through undulating Wealden countryside, it offers views to the Surrey hills and Sussex downs and takes in short sections of the Sussex Border Path and the Downs Link.

The Super 8 route never touches the paved road, it forms an 8 around the mountain.

Photo credit:  https://www.milenio.com/salud/lugares-para-correr-y-hacer-ejercicio-en-torreon

The route starts on the base of the mountain where the electricity cables end.

This is the route for the Squaw Peak 5o trail race.  The FKT is for unsupported completion of the route (no outside support, no supply or water drop).