Roll out of Villeneuve-de-Marsan and let the road carry you past the Château du Prada, then on to the La Douze river and the Le Midour. All 70.1 km of this loop is paved, so you can settle into a rhythm and enjoy the 468 m of climbing as it comes. The rivers mark the way out; the castle marks the way back. Spin home to where you started, one loop complete.
