To get the summit, from Pont de la Lune, the Col d'Andrion ascent is 24.7 km long, with an elevation gain of 1.448 meters. The average percentage is 5.9 %. The surface of the road is asphalt (in awful shape), and chains or snow tyres can be required anytime. The road is very narrow.
The road from Pont de la Lune to the pass is a large and single track. At the summit there is a former military camp called Granges de la Brasque. The road to the summit from Roquebillière is not paved most of the way.