October 9, 2016
This is just one of a whole raft of mountain biking options from Chamonix which is France's top alpine destination. There is a good introduction here: http://www.chamonix.net/english/summer-activities/mountain-biking
The Col de Balme is heaven on a fine day and the ride up from the top of the Charamillon ski lift is about an hour's easyish ride. The way back down on the singletrack under the lift needs advanced skills. There are easy four wheel drive track alternatives.