My wife and I are going on a trip to Paris. She has all kinds of plans for museums to visit. I would like to spend at least a couple of days mountain biking. But I have no idea where to go.

Do any of you have any recommendations as to where we can go so I can get some good singletrack? Maybe 4-5 hours drive from Paris? Somewhere where I could rent a bike?

I am an advanced rider who prefers long, scenic singletrack (as opposed to bike parks).