Roll out of Larressingle and let the ride unfold: past the river L'Osse, on to the Château du Fréchou, then along La Baïse and by the Château de Lasserre. The rivers keep you company — L'Auvignon and L'Auloue — before the castles of Mansencôme and Cassaigne round things off. It's 87.5 km, all paved, with 984 m of climbing, and it brings you back to where you started.
