The dolmen of the Coll de la Llosa is a megalithic complex on the Coll de la Llosa mountain pass between the villages of Bouleternère, Casefabre and Saint-Michel-de-Llotes in the eastern foreland of the Canigou massif, in the north of the Pyrénées-Orientales department in France. The dolmen has served as a boundary marker for the three places since ancient times – at least since the early 19th century.