The GR 22- De Paris Au Mont Saint Michel is a 335 mi trail that starts in Quartier de Grenelle, France and ends in Le Mont-Saint-Michel, France. The trail is considered to be medium to hike and has a total elevation gain of 29161 ft. Normally the trail takes 1 day to complete but can be finished in less than a day. Either you are not allowed to bring your dog on the GR 22- De Paris Au Mont Saint Michel or it is generally not advised. The warmest months are June, July, and August and the coldest months are December, January, and February. The wettest months are December, January, and February and the driest months are March, April, and May. Photo Credit: Binche and Oblomov2