It flows north through the following "départements" and towns:* Hautes-Pyrénées: Lannemezan, Trie-sur-Baïse* Gers: Mirande, Castéra-Verduzan, Valence-sur-Baïse, Condom* Lot-et-Garonne: Nérac, LavardacIt flows into the Garonne near Aiguillon.
Leta 1589 je postal "stadhouder" tudi v provincah Utrecht, Overijssel in Gelderland, medtem ko je bil njegov bratranec Willem Lodewijk "stadhouder" v preostalih dveh provincah, Friziji in Groningenu.