MTB 14 - The 3 rivers challenge – graded black

10 points of interest

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  Natural environment

  The Mont Aigoual forest

  “Aigoual, Forêt d’Exception”
  The French Forestry Office, which manages state forests, launched a programme in 2013 called “Aigoual, Forêt d’Exception” (Aigoual: An Exceptional Forest) with the aim of highlighting the massif’s natural and cultural heritage. The Forestry Office thus tries to foreground the different aspects of its multi-facetted management: production, protection and receiving visitors. One key aspect of this approach, which complements other initiatives by local actors, is to improve visitors’ experience in the forest.

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  Natural environment

  The hidden life of the forest

  Trees grow upwards towards the light while mosses benefit from their shade on the ground and spread out. Like soft cushions or carpets, they hug everything that sticks out of the ground, such as old tree stumps. This soft felted surface is pleasing to see, and an undergrowth without mosses would not be worthy of the name. Legend has it that mosses show which way is north. Wrong!
  Mosses indicate a degree of moisture; they protect the soil from drying out by retaining every last drop of dew. They prepare pockets of humus for the future occupants: grasses and herbaceous plants. They also love the damp of tree trunks and can grow there, on the side that is most exposed to the prevailing rains.

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  Landscape

  Col du Suquet pass

  You are at the highest point of the hike. On the right bank of the Dourbie, the path crosses a sheer slope that is alternatively made up of zones of solid granite and other zones where it has decomposed due to weathering into coarse granitic sand. To the south, the views encompass the entire Lingas massif, a high wooded plateau overlooking, further south, the region around Le Vigan and the Languedocian plain.

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  History

  The hamlet of Espruniers

  This hamlet, which consisted of a sizeable grouping of houses, was inhabited until about 1930. You have stopped on what was probably the threshing floor for grains.

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  Geology

  The schist/limestone contact zone

  Here, the layers of the schist outcrops are almost vertical in places. This contact between Causses and Cévennes, between the primary bedrock and the limestone layers, is due to a geological fault created by the various movements and constraints that have affected the Earth’s crust. In this zone, the schist bedrock has been pushed upwards by several hundred metres along the fault line compared to the limestone plateau, although the latter is less old.

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  Flora

  Calcifugous vegetation

  This section of the path in the schist zone showcases calcifugous (“limestone-avoiding”) vegetation, which only grows on acid soils (schist or granite): especially chestnut trees, ferns, heather and broom.

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  History

  Canayère

  A former farm turned forester's house in 1880. In the early days of the Mont Aiguoal reforestation, forestry officers lived here year-round during their missions. Forestry workers working on the replanting were allowed to use the outbuildings. Later, only one official resided here. Since 1967, no official has permanently lived here. (B. Mathieu)

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  Agriculture

  Les Monts wash house

  The wash house in Les Monts still has running water but the washerwomen have disappeared for good. The site is magical. The water is clear enough for dragonflies to lay their eggs in and for birds to drink

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  Water

  The Bonheur river

  The Bramabiau site is an example of a karst spring. Here, slightly east of Camprieu, the Bonheur River has dug into the Causse (limestone plateau) and disappears in a natural tunnel. It re-emerges into the open at the bottom of the Aven de Balset, but it twists to the south to disappear again below ground. The river meanders through more than 10 km of tunnels. Then, 700 horizontal meters from its sinkhole, it reappears as a spring! The rock walls of the narrow canyon magnify the sound of its waters and add to its rumbling some acoustic vibrations that are close to a gigantic roaring. This is no longer the tranquil Bonheur, it is the tumultuous Bramabiau.

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  History

  Camprieu

  In the 19th century, the village streets were bustling year-round with a throng of artisans, labourers and shopkeepers, who lived in these modest mountain houses that were also suitable for livestock rearing. Camprieu had: two cobblers, six clog makers, two basket makers, one carpenter, two wheelwrights, two farriers, one miller, two stonemasons, one glassworks, one sawmill, one dairy, two grocer’s shops, a haberdashery and ironmonger’s and one shop for ladies’ “fashion and dresses”. There was also a cheese cellar that produced Roquefort until 1932, a hotel and an inn.