The Montbrison tour (trail route no. 13)
From the Le Courounba campsite, head to the bridge spanning the Gyronde. Turn right as you exit the bridge.
Turn left after the restaurants and carry on along the Rif Cros mountain stream.
Fork left and cross the mountain stream. Follow the hairpin track and balcony traverse until you come to the hamlet of Le Bouchier. Carry on uphill.
Continue on the left-hand track to reach the Col de la Trancoulette.
At the Col de la Trancoulette start the descent to the left, taking the marked route on the south-facing side of the valley to return to Les Vigneaux and your starting point.

The village of Les Vigneaux
In spite of the altitude, the region's dry climate and the local growing conditions of limestone and sediments facing due south made the planting of grapevines possible as far back as the tenth century. The municipality owes its name to the presence of these vineyard operations, which were very significant in the late nineteenth century. The almost simultaneous appearance of the phylloxera aphid and the Briançon train, bringing wine from Provence, spelled the end of this activity here.

The eagles of the Tête d'Aval
Eagles can be seen gliding around the Tête d'Aval. In the hottest part of the day, they circle on the thermals rising above the limestone cliffs. Having gained height in this way, they can reach their hunting territory without having to flap their wings.

Achnatherum calamagrostis or silver spike grass
This member of the Gramineae family (now called Poaceae) forms large clumps on stony, dry and sunny ground. It grows in abundance here on the track embankment, taking advantage of the sunlight allowed through by the break in the forest. Its inflorescences reflecting silvery-gold glints are made up of flowerets with long edges. They create a very misty effect in the late summer when the plant is mature, forming large shimmering bouquets in the evening sunlight. .

The marmot
In the alpine pastures, the iconic marmot utters a loud high-pitched whistle to warn its neighbours of approaching danger: the golden eagle is on the prowl! This medium-sized rodent prefers to live in the high-mountain grasslands in family groups. Their favourite pastimes are gnawing, digging, taking a siesta in the sunshine and performing somersaults. In the winter, the marmot takes refuge in its burrow where it hibernates. It is only seen between the months of April and October. It marks the boundary of its territory by rubbing its cheeks on the rocks or leaving droppings.

The woolly berardia
The woolly berardia is a plant that grows approximately 10 centimetres tall and has a short, almost non-existent stem. This perennial member of the Asteracea family grows in limestone and schist screes. It has veined oval, woolly leaves which are covered in soft hairs. Its 4 to 7 cm compact head with pale yellow flowers stands up from its centre.

The common rock thrush
In May, a melodious song rings out from the cliff top. It’s the song of the common rock thrush, appropriately named and a wonderful bird. Although the female is rather dull (an advantage when egg-sitting) the male sports an orange underside and a blue-grey head. A trans-Saharan migratory bird, every year it returns to the mountains of Southern Europe where it frequents the rocky, sunlit slopes. It is not very common and is in decline, so spotting it is even more special!

The role of the canals
Irrigation of meadows and private gardens; preservation of traditions; the promotion of social contact through collective canal maintenance operations carried out by local people; development of canals to create trails for tourists and locals... The canals have fulfilled a variety of roles, hence the benefit of conserving and maintaining them.

The acanthus-leaved thistle
This is a hot, west-exposed slope with rocky ground. The plant life reflects this situation: the narrow-leaved lavender and acanthus-leaved thistle grow here. The latter looks like a large sun with its very big flower head which quickly turns golden and its leaves radiating out around it. It often used to be hung on house doors... but much better to leave it lighting up the stony meadows!

The Montpellier thistle
A large plant grows along the canal side; a sort of thistle although it is not spiky: the Montpellier thistle. Its oval, pointed leaves are edged with large, stiff but non-spiky cilia. Its flowers are pink. In France, it is only found in the Alps and the Pyrenees and a few departments in the south. Associated with wet areas, this species has become rare in many regions because of damage to its habitat.

Mountain land rehabilitation projects
Stream correction dams have been built by RTM (Mountain Land Rehabilitation), a branch of the National Forestry Agency. The purpose of these structures is to limit erosion and mountain stream flooding. The RTM has been in existence for a long time, set up in the late nineteenth century. At that time, the slopes where much more sparsely wooded than they are today, and erosion was a very significant problem.

The owly sulphur
A strange insect, part butterfly, part dragonfly, with large black antennae, transparent wings tinted with yellow or white and with well-defined veining, flies over the meadow during the hottest part of the day. It is the owly sulphur. Owlflies are members of the Neuroptera (net-winged) order and are cousins of ants and lacewings. They are predators of small insects, flies in particular.

The black woodpecker
Sporting a black cap, the black woodpecker is the biggest of the woodpecker family. Wary and solitary, it is difficult to spot, but its strident calls give its presence away. It feeds mainly on ants and insects living in dead trees, which it extracts by hammering into the wood. It hollows out a nest hole in trees. Once the young have left the nest, it may be taken over by owls or forest-dwelling bats.

The violet bird's-nest orchid
In the pine forest undergrowth stands a large, completely purple orchid. It has no leaves, just a few whitish scales on the stem. Lacking chlorophyll (the green plant pigment which plays a role in photosynthesis, the process that allows the production of organic matter), it lives as a parasite on tree roots.

The Scots pine
A long trunk that is reddish-brown towards the top, sparse foliage, grey-green needles grouped in pairs... It has to be the Scots pine. Happy in poor soil, this softwood tree can withstand below-zero temperatures as well as summer droughts, and so it is very common in intra-alpine valleys with a continental climate, like the Vallouise.

The northern wryneck
In the spring, an odd song can be heard among the old trees in the orchard, a loud song similar to that of the green woodpecker, only slower. It is that of the northern wryneck. This bird owes its name to the extreme way it extends and twists its neck when it feels threatened. Its French name torcol fourmilier is a reference to the fact that it feeds on ants (fourmils in French). Difficult to spot because its plumage merges into the colour of the tree trunks, it gives its presence away by its song when it returns from its migration.

On the south-facing slope, pine forest
The track passes through a forest of Scots pines, mixed with some downy oak trees. It is a forest typical of those found in the lower south-facing slopes (those exposed to the sun) in the intra-alpine valleys.

Etruscan honeysuckle
Etruria was the territory of the Etruscans, in the area of present-day Tuscany. Although this honeysuckle does not grow only in Tuscany, it is Mediterranean, however, and only grows naturally in the wild in the southern half of France. Being a plant that needs warmth, it does not grow at altitude, except here where the south-facing slopes are particularly dry and warm. Its large pink and yellow flowers are highly perfumed.