Rocking stone of Huelgoat

The rocking stone of Huelgoat is a porphyritic granite formation standing approximately seven meters long and three meters high, with a weight of around one hundred thirty-seven tons. It sits in such precarious balance on its base that even slight pressure can cause it to move slightly.

The stone took its distinctive form through natural erosion over several thousand years, when the region experienced a humid tropical climate that gradually shaped the granite block. This remarkably unstable equilibrium is the result of millennia of geological weathering processes.

Local Breton folklore attributes the stone's existence to the giant Gargantua, who supposedly threw it here in anger after a poor meal in the region. Visitors today connect this tale to the forest's wild and untamed character.

Visitors can make the stone oscillate by applying pressure at specific points using proper technique and body position against the rock. Arriving earlier in the day often means fewer crowds and more space to explore the surrounding forest area comfortably.

The bluish-white granite composition of the stone is unusual and gives it a distinctive color that sets it apart from other rock formations in the region. This rare mineral makeup contributes to its remarkable ability to move with minimal force.

Location: Huelgoat

Height: 3 m

Length: 7 m

Accessibility: Wheelchair inaccessible

GPS coordinates: 48.36732,-3.74511

Latest update: December 6, 2025 19:00