The IGN TOP 25 hiking map No. 2837 OT covers the following area: Lake Issarlès, Thueyts, Sources of the Loire.
- Contour lines at 10-metre intervals.
- Detailed legend: vegetation, rocks, transport routes down to the smallest paths, buildings down to individual sheds, woodland, isolated trees, rivers, springs and more.
- Waymarked trails and tourist information are shown.
- Scale: 1:25,000 (1 cm = 250 m).
Municipalities covered: Labastide-sur-Bésorgues, Lalevade-d'Ardèche, Pont-de-Labeaume, Fabras, Barnas, Lafarre, Le Roux, Saint-Cirgues-en-Montagne, Lachapelle-Graillouse, Mazan-l'Abbaye, Cros-de-Géorand, Coucouron, Issanlas, Lanarce, Saint-Pierre-de-Colombier, Montpezat-sous-Bauzon.
Places to discover: Monts d'Ardèche Regional Nature Park, Lake Issarlès, Mazan Forest, le Sépoux, Suc d'Ourseyre, Croix de Bauzon Pass, Chaussée des Géants, Chavade Pass, Serre de la Pialade, Monts du Vivarais, le Bruget, Notre-Dame de Prévenchère, Ray Pic Waterfall, Sources of the Loire, Ventadour Castle.