Mare aux Joncs (Sensitive biological reserve)
Coquibus is a particular and very sensitive part of the forest which must be treated with the greatest respect by visitors. Its status as a biological reserve allows you to climb there but this could one day be called into question due to too many visitors or irresponsible behavior. We ask climbers to limit their presence or otherwise their impact in the different areas of Coquibus as much as possible. In particular, do not go in groups, do not climb after sunset and do not use electrical devices (drones, fans, radios, etc.). Reduce chalk to the strict minimum, erase all traces of your passage and finally do not brush new boulders. Avoid leaving the paths and keep your dog on a leash from April to July.
Please read our ethics page.
This sector gathers a few difficult an isolated boulders located in plot 48 and 49, in the North-East part of the Coquibus area, in the North face under the plateau of La Mare aux Joncs. Those problems are accessible by Le Chemin du Petit Mont Rouget from the last parking lot before the motorway along the road from Courances to Arbonne.