The creeks constitute, in Provence, a site classified of 4 000 hectares (nearly 20 km length on 4 km broad) on the communes of Marseille and Cassis. The limestone solid mass plunges out of abrupt cliffs in water of a major blue of the Mediterranean. This landscape of fjords is single in Europe... Fauna and the flora also have attractions; the underwater caves (inhabited with the Neolithic era) and the fresh water sources are numerous.
While looking at close these rocks limestones, one can see there a great quantity of shells marine organisms fossilized since more than 100 million years. The movements of the earth's crust will make tower these grounds sedimentary. Quaternary era is marked by long periods of glaciation intersected with reheatings involving consequentials fluctuations of the seas level and torrential rains level which the flow will accentuate the digging of the Creeks. Added with this intense erosion a dissolution of the rock, determining in the current morphology of the solid mass.
Indeed, while infiltrate, the cold rainwater, acid and very corrosive for limestone, will dig them deeply. That explains the formation of many caves and rivers underground but arks too, candles and needles.
The solid mass of the Creeks is furrowed by a multitude of marked out hiking trails, in all on 145 kilomètres…A forty different paths are indexed and maintained. Most known is the GR. 98 which crosses the Creeks and which thus crosses constantly, divided into 98 A and 98 B. The majority of paths are easy but some required to take some exposed climbing steps in the event of fall, therefore mistrust...
Each creek, points or top is a goal of excursion. The must being well incontestably the crossing of the Creeks of Callelongue with Cassis, a score of kilometers whichl is better to do in several days if we want to benefit from the landscapes and to return visit to each course on the way. Be careful in the Creeks, as in any mountainous solid mass, the distances are not valid…il is rather necessary to count into uneven!
Apart from "the Great Crossing", the routes are divided into two groups : paths of edge of sea and paths of peaks. All the combinations are then possible. At least try to not miss the Morgiou Cape, Grande Chandelle, Devenson and the view-point d’Envau.