Sisteron (French pronunciation: [sistəʁɔ̃]; Occitan: [sisˈtɛru(n)], Mistralian norm: Sisteroun; from Old Occitan: Sestaron) is a commune in the Alpes-de-Haute-Provence department, Provence-Alpes-Côte d'Azur, southeastern France. Sisteron is situated on the banks of the river Durance just after the confluence of the rivers Buëch and Sasse. It is sometimes called the "Gateway to Provence" because it is in a narrow gap between two long mountain ridges.
Location
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Despite its relatively small population, it serves as a long-distance navigation reference point, routinely signed as far away as Grenoble. It is 135 km (84 mi) from Marseille, also 135 km (84 mi) from Grenoble, 180 km (110 mi) from Nice and 40 km (25 mi) from Forcalquier. There are 1,573 hectares (3,890 acres) of forest and wood within the commune.