You start with a downhill section of about 4km on narrow and sometimes rocky paths – some peatbogs too, but nothing too technical. You will go through several cattle barriers, remember to close them properly.
A short but steep section leads you to splendid panoramic views over the Cévennes and announces a grand descent along Le Trenze cliffs.
At the Rocher du Trenze, the descent becomes steeper and more technical, until you reach the Col de Montclar pass. 
Then a short portion on a track before you take a cheerful singletrack that is rather steep.
At Les Bouzèdes, the hardest part of the ascent is over. Just one more uphill kilometre on a path before reaching the track. 
The circuit ends with 2 km of level ground on a pretty forest track.
A short version, waymarked 20v, lets you shorten the circuit to 10 km.

Follow the waymarks for trail #20.
Signposts will guide you all along this route, as well as yellow painted waymarks. In the description below, the signposted place names and/or directions are given in bold italics between quotation marks:

Starting at "Mas de La Barque", head for "Col de Montclar" via "Les écuries de Mas de La Barque", "Rochers de la barque" (2x), "Les faux des Armes", "La Chassalde", "La jasse d'Olibou", "Sous le Col de Montclars".
At "Col de Montclars", go to "Soubre Montclars".
Then return to "Mas de La Barque" via "Soubre Redounde", "Les Bouzèdes", "Bouos d'homme", "La roche fendue", "Sous la roche fendue", "Gadione" (2x), "Rochers de la Barque " (2x) and "Les écuries du Mas de La Barque".
 
This trail is taken from the guidebook Mont Lozère - Pays des sources, published by the Pôle de pleine nature du mont Lozère.

Parking : Mas de la Barque

Area : Espace Trail Mont Lozère