We did not really bother, just opened the map, chose the largest (Calanque de Sormiou) and went there.
The road at the end is rather narrow and uncomfortable, but it's no more than half an hour from Marcel. The entrance fee with a car is about 4 euros, there is a big parking on site. Despite the fact that it was already October, we managed to swim, because the beach there is very nice.
The main goal was a walk on the calanque. From the beach we climbed up, rounded the house and walked along the path towards the sea. Trails can be viewed on this map. Be sure to download the Maps.Me application and map of the park, so you will not get lost.
Came to Cap Redon. There we met a group of tourists with equipment that went on a more complex route.
And also a guy and a girl who were climbing a vertical wall.
The walk was interesting and not difficult, we recommend. Attention! In the summer, some calanques can be closed due to the danger of fires.
Getting there: coordinates of our parking lot N 43 12.665 E 5 25.188. You can reach this place only by car. The closest bus stop is La Cayolle, bus number 23 (schedule). From this point to the beach is about 3 kilometers, but you need to go up and down. There are also pleasure boats from the old port of Marseilles to the park (15-30 euros). But you can not land on the shore, only view calanques from the sea.