Ecrins trekking

Col des Terres Blanches from Prapic

7 h
Duration
Hard
Hard
Return trip
Return trip
22.8 km
Total Length
1634 m
Ascent
Uses
  • By walk
Thematic
  • Flora
  • Geology
  • Pastoralism

Departure : Prapic → Arrival : Prapic

The name of this site keeps its promise! The final surprise is greater because the suspense is kept right until the end.

Magic and enchantment in a lunar landscape "Oh! What dirty pigs!" They have left their empty bottle in this supernatural setting! I get closer to pick it up, but a few metres away I realise my mistake. It is not a bottle but a mountain hare! It relies on its motionlessness to blend into the background. I saw you! Fold your ears back next time!"

Michel Francou, warden in the Champsaur area

From the Prapic car park head up towards the hostels. At the fork in the road (sign) go right. The track runs up along the right bank of the Drac to reach the Charnières plateau. At the oratory, go left to cross the plateau. Walk up the bends that lead to the Saulce chapel. Stay on the right bank until you reach the Saut du Laire footbridge that leads to the valley of the same name. From there, cross the first bridge of the gorges, then the second one 100 m upstream. The path continues to the right towards the Barre de la Cabane. Then the valley skirts up to the left avoiding the Barre de la Cabane. The Barre mountain hut is visible from the bottom of the pasture, leave it on the left hand side and continue until you reach an intermediary plateau. The path continues its way through the pastures until it splits in two: do not follow the right-hand route but follow a long pathway across the slope. Cross the stream and continue to climb until you reach the pass and keep your eyes peeled! No, this a not a hallucination due to lack of oxygen, welcome to the Terres Blanches pass. The return trip is made using the same itinerary in the opposite direction.

Transport

Consider car sharing.

Access

From the village of Orcières, drive 4.5 km on the CD474 towards Prapic.

Information desks

House of Champsaur

Information and documentation, temporary exhibitions. Sale of products and works of the Park. In the same space, home office Tourist High Champsaur. Free admission. All animations of the Park are free unless otherwise stated.


05260 Pont-du-Fossé

Website - Email - 04 92 55 95 44

Lat: 44.6672, Lng: 6.22795

Information centre of Prapic (summer only)

Information centre of the National Park and the Tourism Office of Orcières. Information, documentation. Sale of products and works of the Park. Free admission. All animations of the Park are free unless otherwise stated.


05170 Prapic

Website - Email - 04 92 55 61 92

Lat: 44.69307, Lng: 6.36928

This trek is within park center, please read access rules.

Clic for map interaction

On the way...
History
Prapic Church

Dedicated to Saint-Anne, Prapic Church dates back to the 1860s. It was built following the request of the inhabitants for a place of worship, who were faced with the hazards of winter and the distance from the parish church in Orcières. On the stained glass choir window, you can admire the portrait of Prapicois: Jean Sarrazin (1833-1914), nicknamed the «the poet of the olives", a different poet from that in the tomb ... Can you find it?

Détail d'un vitrail de l'église de Prapic
Architecture
Prapic Hamlet

Surrounded by vegetable gardens, piles of stones and mown terraces the village nestles on the banks of the Drac and gives the best land over to agriculture. The typical house is most often perpendicular to the slope, based on an architecture created from materials collected locally and showing great intelligence in its elaboration. From course plasterwork to the delicacy of walnut wooden doors, shale roofing with gables made from plaited alder, this is the architectural vocabulary that punctuates your visit. 

Jeunes randonneurs au village de Prapic
History
Running water

Running water came to Prapic in 1924. The first pipes were made from metre long sections, hollowed out trunks of larch. Their fitments probably did not enable all the water collected from the six village fountains to be transported!

Une des fontaines de Prapic en hiver
Water
The Drac Noir

This denomination is due to the nature of the terrains that it crosses: the limestone is very sensitive to erosion and the metamorphic rocks in Champoléon valley (Drac Blanc) darken the waters of the river Drac in this way. Bouncing from waterfalls to pools, opening up a passage through the riverside alders, the Drac expresses its nature as a mountain torrent. Brown Trout, White Throated Dipper and delicate ephemerals reveal themselves to the attentive observer.

Cincle plongeur
Fauna
Marmot

If you are patient, you will probably be lucky enough to discover it on the Charnière plateau whose prairies it particularly appreciates, which sometimes poses a problem to the farmer mowing there. Even so, they do represent an undeniable attraction in the valley. Do not be fooled by their easy going appearance, they are wild animals who fight for survival and battles between males can be fierce.

Marmotte au Saut du Laire
Flora
Hay Fields

These natural prairies have never been cultivated. You can find a cavalcade of flowers growing freely. From this botanical diversity flourishes a multitude of insect species especially butterflies, who find an environment favourable to their development. Also, the hay they produce has a very high nutritional value. Maintaining the equilibrium of these environments is essential.

Gros plan sur une prairie fleurie
Flora
Asphodel

Asphodels blossom on the old hayfields. They open out from the bottom to the top over the course of July. It is for this reason that flowers at the base of the flowering stem may go to seed while the flowers at the top are still in bud. The long narrow leaves that grow up from the bottom  of the stem early in the spring have given it the nickname "Dogs' leek".

7-asphodèle_1.jpg
Vernacular heritage
Small stone walls and stone piles

Creating land from the mountain rocks, this is the combat that the mountain-dwellers have carried out since Antiquity. These piles of stones are the witnesses to the time when numerous children piled up stones so that their families could grow food on the conquered land. The family plot, bordered by walls, was ready to be mowed. The Park participes in the maintenance of this inheritance.

Murets et prés de fauche à Charnière
Architecture
Saulce Chapel

You will be able to see it from the first bends up to the Charnières plateau. It is characterized by its apse forming a stem post whose bulk protects the unique roomed vaulted edifice from avalanches. Built from stones from the site, its lime mortar is filled with earthy grit taken from the immediate environment.. It resists the ravages of time and natural phenomena.

La chapelle de La Saulce
Geology
Glacial Relief

The polished rocks that you find just after the walkway are traces of the passage of quaternary glaciers. These are striped; stones once set in the ice, carried by glacial movement have strongly marked them. The flat bottomed valley with a glacial cross cliff is another characteristic of this landscape modelled by glaciers. 

Le Saut du Laire et le Mourre Froid
Pastoralism
Pastoral Cabin at Saut du Laire

Protected from avalanches by a big rock, this small cabin shelters the shepherd from June to the end of July. In order to exploit the supply of grass as it grows, another cabin is situated above the bar which closes the valley completing the equipment of the pasture. For the tranquility of the shepherd, it is best to observe the cabin from a distance.

Alpage du Saut du laire
Pastoralism
Pastoralism on the Barre plateau

The National Park has an agreement with sheep breeders concerning the management of pastures in ways that respects the wild fauna, and are likely to improve the quality of the pastures. The Barre plateau is where the flock from Saut du Laire spend August. Barre of hut (cabane)? Which gave its name to the other? The hut to the barre? Or the barre to the hut?

11-gardiennage serré pour combattre le nard raide_1.jpg
Flora
Androsace vitaliana

A bright patch that blossoms at the same time as snowmelt, Androsace vitaliana is a primulaceae (in other words part of the primrose family). This spring plant, brightens up the recently snow-cleared rockeries with is sulphur-yellow jewels. Strongly rooted in the bare soil, its more or less dense leaf base is made up of stacked up rosettes.

15-la Grégorie vitaliana_1.JPG
Pass
Tourettes mountain pass

The well-named Tourettes pass, is the way to get to Chateau-Roux, in the Durance valley. Up until the nineteen sixties, it was a route used by flocks of sheep who were heading to the Guillestre fair.

16-le Col des Tourettes_1.jpg
Geology
Casse Blanche

Casse Blanche is scree made up of dolomite. This rock gets its name from the geologist Dolomieu who was the person who described it at the beginning of the 18th century. A surprising phenomenon is associated with it: from afar, the rock seems to be very pale, but a fragment of it in your hand reveals a darker shade...

17-Casse Blanche, en aval du col des Terres Blanches_1.JPG
Know-how
Signposting and maintenance of the footpaths

For over twenty years, the Ecrins National Park has developed clear signposting that helps you along the trails. Equally, the upkeep of the tracks is a continual concern, but it must be said that nothing is permanent in the mountains. As you walk across at an altitude of 2500 m, your legs are tired.  Imagine what it would be like if you had to carry a pickaxe as well, in order to maintain the trail.

0-suivez le guide !_1.jpg
Flora
Altitude flora

Eight-petal mountain avens, moss campion, alpine toadflax, saussurea or berardia are all flowers that have adapted to the extreme conditions and have less competition from other species here.

21-dryade à huit pétales_1.jpg
Fauna
Mountain hare

"Lepus Timidus" the latin name for the mountain hare, says it all! He certainly is timid! You are more likely to spot it by chance than because you were looking for it. In winter, it is white, which is its way of coping with its predators which are foxes and golden eagles.

26-discret lièvre variable_1.JPG
Geology
Terres Blanches pass

Below the path, the sight of the rock that has been eroded by water is fascinating. The Terres Blanches pass is a ball of gypsum. Settled at the edge of the alpine ocean 230 million years ago, this rock was then catapulted to an altitude of 2700m some thirty million years ago, because of shifting of tectonic plates. Gypsum is a highly soluble and brittle rock, and nature is left to do what it will to surprise us.

026419

Altitude profile

Altitude (m)

Min : 1527 m - Max : 2724 m

Distance (m)

 

Advice

Flocks of sheep may be guarded by dogs. Some may be good-natured but others less so. Keep calm and keep your distance.