The GR51 runs between Marseille and Frèjus, mostly through the hills behind the French Riviera, over a total distance of 290 kilometres. But between Marseille and Cassis the GR51 runs by the Calanches (Creeks) in the immediate vicinity of a spectacular coast.
On the cards below the GR51 is indicated by the white line. On the left side in the Bouches du Rhone, on the right side in the Var Department.
The path that interests us most runs along the coast between Marseille and Cassis. It crosses the Calanques, an area with an erratic coastline and the many creeks, which is a paradise for hikers. The total stretch between Marseille and Cassis is an ample 20 kilometers which takes at least 7 to 8 hours. However, you can explore the area in several pieces. A stay of three days is a minimum, even for a superficial exploration. However, avoid the summer period, not only because of the hustle and bustle but also because this area is often closed for hikers because of the fire hazard.
Of the remaining part of the GR51, we only can show a picture of the Massif des Maures, where the GR51 runs along the Route des Crêtes, on narrow paths, between the maquis or by dense foliage and pine forests.