From the South
If you come from the South (Marseille, Aix-en-Provence) by the motorway, leave the motorway at Sisteron Nord. After the toll take the direction of Serres and grenoble on the round-about. Continue to Serres. At the round-about in Serres, continue on the N75 (right) in the direction of Gap and Grenoble. A few kilometres after Serres and after crossing a bridge you arrive at another round-about. Go to your right in the direction of Veynes and Gap. At Pont-de-Chabestan go to your right (D49) over the bridge of the Buëch in direction of Chabestan. At the first possibility go to your left (D448) and again to your left at the next road (D48). After two kilometres you arrive at Domaine de Sivas. Domaine de Sivas is at your left at a blue sign. La Ferme is the first building you come accross, continue to your right onto Le Poème or La Lavandole.
For more detailed directions have a look at Google Directions.