The Cosmique Ridge is a mountaineering expedition for beginner climbers and up, but not for inexperienced climbers. You will need a minimum of previous Alpine climbing experience, notably in abseiling and rope skills, as well as great physical conditions. While the Cosmique Ridge can be climbed at any period of the year if conditions are favorable, it is especially popular during summertime as the season offers the best odds to have good weather. High season and a high number of beginners can easily lead to bottlenecks on the crux part of the climb, so it is recommended to visit in lower season if you are looking for a more peaceful experience. Finally, this is a high altitude climb so make sure that your insurance covers you for this kind of adventure.