Marked mountain bike circuit no. 4.
Start from the parking lot behind Vertes Sensations. 50m after the bridge over the Leysse, take the path to the right, heading north (with your back to the lake). After skirting the Leysse on footpaths, you join the busy lake plain road to pass under the freeway. Caution: it's best to stop before crossing the motorway and return to the banks of the Leysse on a narrow path. Then turn right just before an old sawmill (bridge over the Leysse) to reach the flower-filled hamlet of Les Gollets. Follow the road up to the Nances church, then continue along the "Villard" road to Les Giffards. Take the wide path that climbs to the right between the houses to reach the top of the trail to the ruins of the Villas Doria (easy for VTTAe, but hard on the muscles!). The beautiful descent to the lake begins! You're soon in the forest on a single track that poses no major problems apart from a few tight hairpins.

Lovers of technique will appreciate the hairpin bends and tricky sections. We pass the Nances cemetery. The route becomes a little less technical, although there are still some fine sections.
When you reach a small road, turn right, then at Les Bellemins, turn left and go straight on at the bread oven, then take a passage under the freeway.
This route is rated red (despite its distance), as it is best suited to technical mountain bikers.
To be avoided in wet weather, as the technical sections become quite risky.