Lac d’Aiguebelette is about an hour from Geneva and Lyon airports. The region around the lake has trails which feature plenty of single tracks, technical descents, challenging climbs and inevitably some road to connect the tracks. Remember to keep right.
The office de tourisme in Lepin-le-Lac sells maps of nine circuits which range from 2.7 miles and 150 feet of climbing to 16 miles and 3900 feet. The routes are also available on gpsies.com. Bikes can be hired from Vertes Sensations. Repairs and parts are available from Le Biclou, a cycle shop in nearby La Bridoire.
In June there is an event organised by Club VTT du Lac d’Aiguebelette. Circuits of various distances and ascents are waymarked and food stops are provided. Google vtt, aiguebelette and randonnee. The event is an excellent opportunity to experience the hospitality of a friendly French MTB club.