We'd intended a much longer ride, but the heat was too much and we aborted the original plan on the steep climb on D204 out of Le Cheylard.
The bicycle path from an old railway line was excellent...as long as one has relatively hefty tires. Our 700Cx35 tires did fine. This would not be good for narrow racing bike tires.
Beautiful countryside. We highly recommend this.
Note that the profile and the elevation gain/loss numbers make no sense. Both the rail trail up and D120 back down were pretty much constant and gradual. The elevation gain shouldn't be more than 350 or 400 at the most.