There’s a nice seafront promenade for running in Anglet, a coastal town located just north of Biarritz that’s known for its 11 Atlantic surfing beaches. The paved promenade starts where the Adour River runs into the sea and runs south along the beach for 4.5 km to Sara’s Rock. Enjoy the nice water views with pine forest in the background, and a festive scene of surfing schools, hotels, and restaurants.
The beach itself is good for running, depending on tide, surf, and crowds! Can be tough to run on sometimes, like quicksand near the water according to a couple of folks.
For some variety and great views, add the 2.5 km Cliff Walk. It runs from the southern end of the promenade and climbs for 50m, using Prom. des Sources/All Paul Preito (see map). The full out and back route, including the Cliff Walk, is 9.6 km.
Add-Ons/Altetrnatives: The Forêt du Pignada is ~1 km inland, with its many km of trails lined with pine trees. Best access is from Les Cavaliers Beach (use Av. des Cavaliers). There are good trail signs. You can also extend the promenade run by joining our Biarritz Waterfront route, just south of Sara’s Rock.