From Lectoure, D7 direction Condom; cross the railway and after 1,8km (1.15 miles) turn on your right, direction Manaut; follow the communal road - it is also the GR65 -; after 3km on your right the indicator Verduzan, Mirlande, A Labourdette, with no issue; follow this way until you'll see the indication A Labourdette just in front of you.
GPS: Mirlande