Be it open on sand or in the woods. If the landing is on sand or on rocks etc. There is an area where the height validates usage of a rope. This is Dame Jouanne, north-east of the village of Larchant. Also a small rucksack for carrying comfortable shoes like trainers and some food and water is also very handy.
Some circuits are very long.
The best thing to do is bring your stuff with you for a rest halfway through the course. Explanation of colour coding that is used The colours that are used to describe the difficulty of the course are white, yellow, orange, green, blue, red and black. Be careful though. The start of a circuit is depicted by using the letter D as in Depart. A means Arrivee.