The old Perroud bridge, the waterfall and the ruins of the old mill are signs of just how much power the High-Jura needed to be able to grind, saw, and strike iron for example.
Viewpoint over Mont Fier
Mont Fier seems to defy the rules of morphology set by the Jura relief. By its very definition, a mountain is comprised of an anticline (a fold that is convex upwards) and a synclinal valley (a fold that is convex downwards). However, on observing the limestone strata that make up Mont Fier’s cliff, there are signs of a very shallow syncline. This rocky headland, isolated between two depressions, is the only example of a perched syncline in the Jura.
The red crossbill
This bird climbs up branches much like a parrot would, using its crossbill. In terms of plumage, the male wears a brick red colour with brown wings and a brown tail. The female has olive plumage along her back and a yellow breast. This bird feeds primarily on conifer seeds. Food is also an important guide for this species behaviour; should food be lacking, it may suddenly leave its habitat for a more suitable environment. This mountain bird nests in the middle of winter, despite the harshness of the climate, to adapt to the period during which spruces start producing seeds.
The Espace des Mondes Polaires (Polar World Centre)
Dive into a polar universe on your trip to the Espace des Mondes Polaires (Polar World Centre), the first cultural centre in France dedicated to issues relating to the Arctic and Antarctic, the climate and the environment. An ice rink and a restaurant are also available on-site.To find out more, visit: http://www.espacedesmondespolaires.org
From the village centre, the trail heads up through the village (white and red waymarking) towards the Forebay of la Chaille via the D 25. At Abbé Barthelet, continue and follow the road to the left that descends to Prémanon d’Amont. After a steep descent, a forest path will lead you to the walkway over the Forebay of la Chaille.
- The waterfall can be reached within 10 mins to your right by following GR® 5, at the foot of a former mill.
The trail, that is rocky and muddy in some places, branches off to the left under the cover of forest to reach Sous le Saut and Le Bonzon.
Head down to the path to your left (yellow waymarking) until you reach PERROUD BRIDGE. Cross the recently restored bridge and head up a very steep trail. A narrow and steep trail to your left opens onto a gravel path and crosses over an intermittent stream. Head up to the right to Sur le Bief (house). The trail then turns right on a good path, crosses the D 25 and comes to Sur le Belvédère.
The BELVEDERE OF THE MAQUISARDS is 5 minutes away to your right across the D 25.
Returning to Sur le Belvédère, head opposite you up the old "route de Morez", towards Prémanon, with the Chez Jeankessis farms on your left.Without ever changing direction, heading due south, follow a road for 150 m, and then a path for 400 m. The trail crosses another road behind the hamlet "Sur la truffe" before exiting onto the D 25 at the entrance of PREMANON.
Be careful around the gorges of Perroud bridge and on both occasions when crossing the D25.
This trail uses forest paths. To respect the owners and farmers granting you passage, and for the security of livestock and wild fauna, we ask that you remain on the waymarked paths. Use the adapted passageways to get across fencing and be sure to close gateways behind you.
Please keep your dog on a lead if you have one.
Wild flowers are beautiful, they may be rare and protected and often wilt quickly. Do not pick them! They will delight the next hikers.
In case of forest works (felling, skidding, etc.), for your safety, know when to stop and turn around.
To visit and get about in the High-Jura, visit www.reshaut-jura.fr, the eco-mobility portal listing all means of transport within the Park.
Access and parking
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Les Rousses fort
From the village of Les Rousses, there is no sign of a construction of this size. Both around the ramparts and from the centre of the Place d’Arme, the Les Rousses fort inspires curiosity and admiration.
Demilitarised and converted, the fort is now open to the public and can be discovered through various leisure activities.