The trail "The valley of Grenand" takes you to the discovery of the river erosion, gorges, giant pots and waterfalls. The small loop is equipped with educational terminals and to discover the work of water.

The Grenand Comb : The trail leaves from behind La Bridoire Church and follows the route of the GR9 (white and red). After a steep climb to Les Roches, leave the GR9 to go right. The trail marked in yellow crosses a chesnut tree wood then follows a small, country road to come back to the departure point.