Arbizon
There are many routes to reach the Arbiron. All of them are very steep and involve a high level difference. Go preferable to the Arbizon without snow, unless you really know what you are doing.
* The most common is from Aulon from a place commonly known as the "Granges de Lurgues" (Lurgues barns). Climb north into a very steep and monotonous slope of schist screes until the end... beware not to slip in one or two places, few easy scrambles required here and there.
* Another quite famous route is from the Hourquette d'Ancizan, via the North face of the Arbizon, which is said to me much more spectacular, and a bit more difficult, with easy rock-climbing. Climb first to the Coume de la Maoubé, and the corridor via the Petit Arbizon, which you can additionally climb.
* Another similar approach from Payolle goes via the Lake of Arrou, but extending the walk approach. The Monfaucon can be climbed additionally.

Arbizon