GR10 Segment 42: From Mariailles to Refuge Cortalets

GR10 Segment 42: From Mariailles to Refuge Cortalets is a 10.1 mile point-to-point trail located near Casteil, Occitania, France that features a lake and is rated as difficult. The trail is primarily used for hiking, camping, nature trips, and backpacking and is best used from June until October.