At the end of the 19th century, in the Haut Guil area, the mountain rumbled. A succession of cracking sounds and screams were heard. A dust cloud appeared in the distance. Some thought it was an earthquake. In the following days, the local inhabitants went to a place called ‘lou pas des maisons’ and had a major surprise: part of the Pic des Lauzes had collapsed and millions of tons of rocks covered the hay fields. La Roche écroulée is the result of this event.