| Grand Bois | Copyright © 2006 | ||
| Height: 1,160m | |||
| Range/Area: Alpes | |||
| Route: from St Etienne 17 km - ave 3.8%, (max 6.3%) | |||
| from Bourg Argental 12 km - ave 5.2%, (max 7.9%) | |||
| Category: 3, 2 | |||
| History: | |||
| 1950 | Grand Bois (2-1160) - Raphael Geminiani (Fra) | Stage 19 Briancon to St Etienne, 291 km | |
| 1961 | Grand Bois (2-1160) - Guy Ignolin (Fra) | Stage 9 St Etienne to Grenoble, 230 km | |
| 1963 | Grand Bois (3-1160) - Federico Bahamontes (Esp) | Stage 15 St Etienne to Grenoble, 174 km | |
| 1966 | Grand Bois (3-1160) - Ferdinand Bracke (Bel) | Stage 19 Chamonix to St Etienne, 264 km | |
| 1971 | Grand Bois (3-1160) - Cyrille Guimard (Fra) | Stage 10 St Etienne to Grenoble, 188 km | |
| 1997 | Grand Bois (3-1160) - Richard Virenque (Fra) | Stage 13 St Etienne to L'Alpe d'Huez, 203 km | |
| Profile from St Etienne | |||
| Profile from Bourg Argental | |||
| Return to Grand Tour Climbs | |||