In reply to Leedsbee:
Much like anywhere else, if there is a bit of sun and/or a breeze running, then stuff will dry out. Best bets to head for are the places which are out of the trees and exposed near the top of a hill.
Some quick drying options off the top of my head:
95.2
Rocher Fin (longish walk)
bits of Apremont
Canche au Merciers
Col du Chien
parts of Rocher Sabot
Just make sure you take a boot rag or carpet to brush off damp sand from your shoes before you climb.