Whilst the route is not too extreme, it is a multi-day challenge with back to back days of up to 130km (80 miles). You should already be riding off road but if not confident, there will be optional training days at an extra cost available prior to the first ride.

If you are unsure whether yo are or could be fit enough, please make sure you visit a qualified doctor for approval! 

It is common place in France to have to have a certificate dated and stamped by a GP to prove this.