The Sanctus valley contains a series of 15 walks, ranging from an hour to a whole day trip, between the towns of Brusque and Murat sur Vèbre. All are marked and maintained, and there's an accompanying walking guide with maps and notes on local history, flora and fauna.
The terrain is generally sloping, changing from thick woodland hillsides through shaded riverbanks and streams to open plateaux and farmland. Most is graded 'moderate' in difficulty, for those with some experience of hill walking, but there's something for everyone with reasonable mobility and the scenery is superb.
At neighbouring Murat you can pick up the Arles-Toulouse stretch of the Compostela route into north west Spain, the most important of medieval Europe's pilgrimages and still walked by thousands each year.
There are many other great places to walk in the area, such as the Caroux, Vallée de l'Orb and the spectacular Gorges d'Héric, making Blanc a great base for a walking holiday.