Marbre Rose circuit (trail route no. 3)

The Bouchouse mountain stream is fed by the Le Pansier and La Pisse mountain streams 1,900 metres above sea level. It crosses the municipality of La Roche-de-Rame, supplying it with water. This mountain stream then flows into the Durance below the municipality.

The narrow-leaved lavender has greenish-grey leaves and violet flowers. It grows in sunny areas, a reminder that the Pays de Écrins is in the Southern Alps after all! Not to be confused with the lavandin, this plant naturally grows on rocky slopes in the mountains of the Midi. The word «lavender» is thought to come from the Latin "to wash". This etymology suggests that lavender was used at a very early date to perfume washing.

Des aiguilles jaune d’or en automne, des cônes violets au printemps… Le mélèze est un nuancier de couleurs tout au long de l’année, il porte plutôt bien son appellation d’arbre lumière. Il perd ses douces aiguilles caduques en automne et hiver. Au printemps, les petites branches de ce conifère sont parsemées de fleurs femelles, qui deviendront des cônes, et mâles. Le mélèze se plaît sur l’ubac et illumine la montagne.

Une petite population de mouflons fréquente les lieux. Le mouflon méditerranéen, issu de croisements entre mouflons de Corse et d'autres espèces de mouflons ou de moutons, a été introduit il y a plusieurs décennies par les sociétés de chasse. C'est un animal mal adapté à la neige, aussi se tient-il sur les pentes sud vite déneigées. Le mâle arbore de grandes cornes enroulées. Les femelles, le plus souvent sans corne, peuvent parfois en avoir, droites et peu développées.

Bel Pinet stands at 1,400 metres above sea level in the Bouchouse valley, in the municipality of La Roche-de-Rame. Bel Pinet, or Bel-Pinet, designates the slopes under the rocky cliffs of the Oumbras. It was once irrigated by the Bel Pinet Canal, which suggests that it used to be cultivated and would therefore have been less wooded. The term "Pinet" simply means a place planted with pines (Pinus in Latin). So Bel Pinet means a beautiful place planted with pines, or a beautiful pine wood.

The path runs through a forest of Scots pine, recognisable by its orangey trunk, especially at the top. This tree is very drought-resistant (it is very limey soil here) and can also withstand low temperatures. It is therefore found in large numbers in the intra-alpine valleys. 

Here, a wood of aspen trees, with smooth greenish trunks and round, crenulated leaves, adopt magnificent autumn colours. The petiole («tail») of aspen leaves is flat and twisted and can therefore be caught by the slightest breath of air. This has the effect of making the foliage tremble, hence its French name bois de tremble!

In the nineteenth century, there were four quarries in La Roche-de-Rame. They exploited deposits of metamorphosed limestone which was pink in colour. One of these, the Combe Mounière quarry, produced stone which was used in particular in the construction of the new Cathedral of Saint-Arnoux in Gap, between 1866 and 1904. When exposed to the elements, the surface of the limestone takes on a grey patina.