This is a great safe route for walking, cycling, horse riding. It is 76km Long from Mazamet Railway station to Bédarieux Railway station but it is very relaxing (there is a little steep bit in the middle that takes some effort) but a lot of very gradual ups and downs you hardly notice. A few cool tunnels - some short one long, mostly lit activated by sensors as you enter. We rode it in 2 halves one way and in one day on our return (it was dull and cool so easier than the 35 degrees for the first part of our trip). Lots of lovely shade and many shaded benches to take a break, have a picnic etc. (don’t forget to take your crap home with you!!) Just a very peaceful place to be. Nice towns and villages en route to explore as well as the caves at Courniou approx midway.