Course: At 230km, this is the longest stage of the race, and together with the likely fast pace and baking hot weather, it could be one of the most grueling, too. It starts at Béziers on the Mediterranean seaboard before cutting across the southeast corner of the Massif Central on winding back roads that are constantly dipping and climbing through the foothills. The critical part of the stage comes with 60km to go, from where the race twists through the spectacular canyons of the Ardèche and Ibie rivers and crests two Cat. 4 climbs before emerging onto the N.102 highway with 25km to go. There’s a fast twisting descent to the wide Rhône River, which the race crosses before a flat finish in Montélimar.

History: Surprisingly, for a city of 30,000 and the home of world-famous nougat candy, Montélimar has never hosted a stage.

Stage 13: Béziers to Montélimar - 230km

Favorites: This marathon stage is ideal for a small group to gain a substantial lead in the early kilometers. If potentially dangerous riders like CSC's Fränk Schleck are in the breakaway then the yellow jersey’s team won’t let the move get too far ahead. Otherwise, there will be little opposition to a break with riders way down on GC. It could suit a rider like Rabobank’s Pieter Weeningor Davitamon’s Chris Horner.